diff --git a/qucs/qucs/dialogs/CMakeLists.txt b/qucs/qucs/dialogs/CMakeLists.txt
index dfbb2b2671..af9e56b361 100755
--- a/qucs/qucs/dialogs/CMakeLists.txt
+++ b/qucs/qucs/dialogs/CMakeLists.txt
@@ -7,6 +7,7 @@ INCLUDE_DIRECTORIES( ${CMAKE_SOURCE_DIR}
 #INCLUDES = $(X11_INCLUDES) $(QT_INCLUDES) -I$(top_srcdir)/qucs
 
 SET(DIALOGS_HDRS
+aboutdialog.h
 changedialog.h
 digisettingsdialog.h
 exportdialog.h
@@ -35,9 +36,11 @@ importdialog.cpp		savedialog.cpp labeldialog.cpp
 searchdialog.cpp     librarydialog.cpp settingsdialog.cpp
 matchdialog.cpp			simmessage.cpp newprojdialog.cpp
 sweepdialog.cpp			exportdialog.cpp loaddialog.cpp
+aboutdialog.cpp
 )
 
 SET(DIALOGS_MOC_HDRS
+aboutdialog.h
 changedialog.h
 digisettingsdialog.h
 exportdialog.h
diff --git a/qucs/qucs/dialogs/Makefile.am b/qucs/qucs/dialogs/Makefile.am
index d355845166..e6be37e3c4 100644
--- a/qucs/qucs/dialogs/Makefile.am
+++ b/qucs/qucs/dialogs/Makefile.am
@@ -28,7 +28,7 @@ MOCHEADERS = settingsdialog.h simmessage.h qucssettingsdialog.h      \
      labeldialog.h changedialog.h matchdialog.h digisettingsdialog.h \
      sweepdialog.h searchdialog.h librarydialog.h importdialog.h     \
      packagedialog.h savedialog.h vasettingsdialog.h                 \
-     exportdialog.h loaddialog.h newprojdialog.h
+     exportdialog.h loaddialog.h newprojdialog.h aboutdialog.h
 
 MOCFILES = $(MOCHEADERS:.h=.moc.cpp)
 
@@ -40,8 +40,8 @@ libdialogs_a_SOURCES = settingsdialog.cpp newprojdialog.cpp \
      simmessage.cpp qucssettingsdialog.cpp labeldialog.cpp changedialog.cpp \
      matchdialog.cpp sweepdialog.cpp digisettingsdialog.cpp searchdialog.cpp \
      librarydialog.cpp importdialog.cpp packagedialog.cpp \
-     savedialog.cpp vasettingsdialog.cpp \
-     exportdialog.cpp loaddialog.cpp
+     savedialog.cpp vasettingsdialog.cpp exportdialog.cpp loaddialog.cpp \
+     aboutdialog.cpp
 
 nodist_libdialogs_a_SOURCES = $(MOCFILES)
 
diff --git a/qucs/qucs/dialogs/aboutdialog.cpp b/qucs/qucs/dialogs/aboutdialog.cpp
new file mode 100644
index 0000000000..750f784e07
--- /dev/null
+++ b/qucs/qucs/dialogs/aboutdialog.cpp
@@ -0,0 +1,258 @@
+/*
+ * aboutdialog.cpp - customary about dialog showing various info
+ *
+ * Copyright (C) 2015, Qucs team (see AUTHORS file)
+ *
+ * This file is part of Qucs
+ *
+ * Qucs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Qucs.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*!
+ * \file aboutdialog.cpp
+ * \brief Implementation of the About dialog
+ */
+
+#include <array>
+#include <algorithm>
+#include <random>
+
+#include <iostream>
+#include <string>
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "aboutdialog.h"
+
+#include <QObject>
+#include <QTabWidget>
+#include <QVBoxLayout>
+#include <QPlainTextEdit>
+#include <QTextBrowser>
+#include <QLabel>
+#include <QPushButton>
+#include <QApplication>
+#include <QDebug>
+
+
+AboutDialog::AboutDialog(QWidget *parent)
+    : QDialog(parent)
+{
+  currAuths = {{
+    tr("Guilherme Brondani Torri - GUI programmer, Verilog-A dynamic loader"),
+    tr("Mike Brinson - testing, modelling and documentation, tutorial contributor"),
+    tr("Richard Crozier - testing, modelling, Octave."),
+    tr("Bastien Roucaries - bondwire and rectangular waveguide model implementation"),
+    tr("Frans Schreuder - GUI programmer, release"),
+    tr("Clemens Novak - GUI programmer"),
+    tr("Vadim Kuznetsov - filter synthesis (qucs-activefilter), SPICE integration (NGSPICE, Xyce)"),
+    tr("You-Tang Lee (YodaLee) - GUI programmer, Qt4 porter"),
+    tr("Claudio Girardi - testing, general fixes")
+  }};
+  
+  prevDevs = {{
+    tr("Michael Margraf - founder of the project, GUI programmer"),
+    tr("Stefan Jahn - Programmer of simulator"),
+    tr("Jens Flucke - webpages and translator"),
+    tr("Raimund Jacob - tester and applyer of Stefan's patches, author of documentation"),
+    tr("Vincent Habchi - coplanar line and filter synthesis code, documentation contributor"),
+    tr("Toyoyuki Ishikawa - some filter synthesis code and attenuator synthesis"),
+    tr("Gopala Krishna A - GUI programmer, Qt4 porter"),
+    tr("Helene Parruitte - programmer of the Verilog-AMS interface"),
+    tr("Gunther Kraut - equation solver contributions, exponential sources, author of documentation"),
+    tr("Andrea Zonca - temperature model for rectangular waveguide")
+  }};
+
+  trAuths = {{
+    tr("German by Stefan Jahn"),
+    tr("Polish by Dariusz Pienkowski"),
+    tr("Romanian by Radu Circa"),
+    tr("French by Vincent Habchi, F5RCS"),
+    tr("Portuguese by Luciano Franca, Helio de Sousa, Guilherme Brondani Torri"),
+    tr("Spanish by Jose L. Redrejo Rodriguez"),
+    tr("Japanese by Toyoyuki Ishikawa"),
+    tr("Italian by Giorgio Luparia and Claudio Girardi"),
+    tr("Hebrew by Dotan Nahum"),
+    tr("Swedish by Markus Gothe and Peter Landgren"),
+    tr("Turkish by Onur and Ozgur Cobanoglu"),
+    tr("Hungarian by Jozsef Bus"),
+    tr("Russian by Igor Gorbounov"),
+    tr("Czech by Marek Straka and Martin Stejskal"),
+    tr("Catalan by Antoni Subirats"),
+    tr("Ukrainian by Dystryk"),
+    tr("Arabic by Chabane Noureddine"),
+    tr("Kazakh by Erbol Keshubaev")
+  }};
+  
+
+  std::shuffle(currAuths.begin(), currAuths.end(), rng);
+
+  QLabel *lbl;
+
+  setWindowTitle(tr("About Qucs"));
+
+  all = new QVBoxLayout(this);
+  //all->setContentsMargins(0,0,0,0);
+  //all->setSpacing(0);
+
+  QLabel *iconLabel = new QLabel();
+  iconLabel->setPixmap(QPixmap(QString(":/bitmaps/hicolor/128x128/apps/qucs.png")));
+
+  QWidget *hbox = new QWidget();
+  QHBoxLayout *hl = new QHBoxLayout(hbox);
+  hl->setContentsMargins(0,0,0,0);
+
+  hl->addWidget(iconLabel);
+  all->addWidget(hbox);
+ 
+  QWidget *vbox = new QWidget();
+  QVBoxLayout *vl = new QVBoxLayout(vbox);
+  //vl->setContentsMargins(0,0,0,0);
+  hl->addWidget(vbox);
+
+  QString versionText;
+  versionText = tr("Version")+" "+PACKAGE_VERSION+
+#ifdef GIT
+    " ("+GIT+") " +
+#endif
+    "\n";
+
+  vl->addWidget(new QLabel("<span style='font-size:x-large; font-weight:bold;'>Quite Universal Circuit Simulator</span>"));
+  lbl = new QLabel(versionText);
+  lbl->setAlignment(Qt::AlignHCenter);
+  vl->addWidget(lbl);
+  vl->addWidget(new QLabel(tr("Copyright (C)")+" 2003-2009 "+
+			   tr("by Michael Margraf")+"\n"+
+			   tr("Copyright (C)")+" 2011-2015 "+
+			   tr("Qucs Team")));
+
+  lbl = new QLabel("\nThis is free software; see the source for copying conditions."
+		   "\nThere is NO warranty; not even for MERCHANTABILITY or "
+		   "\nFITNESS FOR A PARTICULAR PURPOSE.\n");
+  lbl->setAlignment(Qt::AlignHCenter);
+  all->addWidget(lbl);
+
+  QTabWidget *t = new QTabWidget();
+  all->addWidget(t);
+  connect(t, SIGNAL(currentChanged(int)), this, SLOT(currentChangedSlot(int)));
+
+  authorsBrowser = new QTextBrowser;
+  // the Ctrl-Wheel event we would like to filter is handled by the viewport
+  authorsBrowser->viewport()->installEventFilter(this);
+  trBrowser = new QTextBrowser;
+  trBrowser->viewport()->installEventFilter(this);
+
+  QString supportText;
+  // link to home page, help mailing list, IRC ?
+  supportText = tr("Home Page") + " : <a href='http://qucs.sourceforge.net/'>http://qucs.sourceforge.net/</a><br/>"+
+    tr("Documentation start page") + " : <a href='http://qucs.sourceforge.net/docs.html'>http://qucs.sourceforge.net/docs.html</a><br/>" +
+    tr("Components reference manual") + " : <a href='http://qucs.github.io/qucs-manual/'>http://qucs.github.io/qucs-manual/</a><br/><br/>" +
+    tr("If you need help on using Qucs, please join the") + "<br/>" +
+    tr("help mailing list") + " : <a href='https://sourceforge.net/p/qucs/mailman/qucs-help/'>" + tr("qucs-help on SourceForge") + "</a><br/>" +
+    "<small>(" + tr("please attach the schematic you are having problems with") + ")</small><br/><br/>" + 
+    // use http://webchat.freenode.net/?channels=qucs ?
+    tr("IRC general discussion channel") + " : <a href='irc://irc.freenode.net/qucs'>#qucs on freenode.net</a><br/><br/>" +
+    tr("Additional resources") + " : <a href='https://github.com/Qucs/qucs#resources'>https://github.com/Qucs/qucs#resources</a>";
+
+  QTextBrowser *supportBrowser = new QTextBrowser;
+  supportBrowser->viewport()->installEventFilter(this);
+  supportBrowser->setOpenExternalLinks(true);
+  supportBrowser->setHtml(supportText);
+
+  QString licenseText;
+  licenseText = "Qucs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.<br/><br/>This software is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details..<br/><br/> You should have received a copy of the GNU General Public License along with Qucs, see the file COPYING. If not see <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a> or write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,Boston, MA 02110-1301, USA.";
+
+  QTextBrowser *licenseBrowser = new QTextBrowser;
+  licenseBrowser->viewport()->installEventFilter(this);
+  licenseBrowser->setOpenExternalLinks(true);
+  licenseBrowser->setHtml(licenseText);
+
+  t->addTab(authorsBrowser, tr("Authors"));
+  t->addTab(trBrowser, tr("Translations"));
+  t->addTab(supportBrowser, tr("Support"));
+  t->addTab(licenseBrowser, tr("License"));
+
+  QWidget *hbBtn = new QWidget();
+  QHBoxLayout *hlBtn = new QHBoxLayout(hbBtn);
+  hlBtn->setContentsMargins(0,0,0,0);
+  all->addWidget(hbBtn);
+
+  QPushButton *okButton = new QPushButton(tr("&OK"), parent);
+  okButton->setFocus();
+  connect(okButton, SIGNAL(clicked()), this, SLOT(close()));
+  hlBtn->addStretch();
+  hlBtn->addWidget(okButton);
+
+  setAuthorsText();
+  setTrText();
+  prevTab = 0; // first Tab is selected by default
+}
+
+void AboutDialog::currentChangedSlot(int index) {
+  if (prevTab == 0) { // deselected tab with current and previous authors
+    // shuffle them
+    std::shuffle(currAuths.begin(), currAuths.end(), rng);
+    std::shuffle(prevDevs.begin(), prevDevs.end(), rng);
+    setAuthorsText();
+  } else if (prevTab == 1) {// deselected tab with translators
+    std::shuffle(trAuths.begin(), trAuths.end(), rng);
+    setTrText();
+  }
+  
+  prevTab = index;
+}
+
+void AboutDialog::setAuthorsText() {
+ 
+  QString authorsText;
+  authorsText = tr("Current Qucs Team:") + "<ul>";
+  
+  for(QString& tStr : currAuths) {
+    authorsText += ("<li>" + tStr + "</li>");
+  }
+  authorsText += "</ul>";
+  authorsText += tr("Previous Developers") + "<ul>";
+  for(QString& tStr : prevDevs) {
+    authorsText += ("<li>" + tStr + "</li>");
+  }
+  authorsText += "</ul>";
+  
+  authorsBrowser->setHtml(authorsText);	
+}
+
+void AboutDialog::setTrText() {
+  QString trText;
+  trText = tr("GUI translations :") + "<ul>";
+  for(QString& tStr : trAuths) {
+    trText += ("<li>" + tStr + "</li>");
+  }
+  trText += "</ul>";
+  
+  trBrowser->setHtml(trText);	
+}
+
+// event filter to remove the Ctrl-Wheel (text zoom) event
+bool AboutDialog::eventFilter(QObject *obj, QEvent *event) {
+  if ((event->type() == QEvent::Wheel) &&
+      (QApplication::keyboardModifiers() & Qt::ControlModifier )) {    
+    return true; // eat Ctrl-Wheel event
+  } else {
+    // pass the event on to the parent class
+    return QDialog::eventFilter(obj, event);
+  }
+}
+
+
diff --git a/qucs/qucs/dialogs/aboutdialog.h b/qucs/qucs/dialogs/aboutdialog.h
new file mode 100644
index 0000000000..785c814d08
--- /dev/null
+++ b/qucs/qucs/dialogs/aboutdialog.h
@@ -0,0 +1,65 @@
+/*
+ * aboutdialog.h - customary about dialog showing various info
+ *
+ * Copyright (C) 2015, Qucs team (see AUTHORS file)
+ *
+ * This file is part of Qucs
+ *
+ * Qucs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Qucs.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef ABOUTDIALOG_H
+#define ABOUTDIALOG_H
+
+#include <random>
+#include <array>
+
+#include <QDialog>
+#include <QVBoxLayout>
+
+class QString;
+class QTextBrowser;
+
+class AboutDialog : public QDialog  {
+   Q_OBJECT
+
+public:
+  AboutDialog(QWidget *parent = 0);
+
+protected:
+  bool eventFilter(QObject *obj, QEvent *ev);
+
+private:
+  void setAuthorsText(void);
+  void setTrText(void);
+
+  std::array<QString, 9> currAuths; // current Qucs authors
+  std::array<QString, 10> prevDevs; // previous Qucs developers
+  std::array<QString, 18> trAuths; // Qucs translators
+
+  QVBoxLayout *all;
+  QTextBrowser *authorsBrowser; // to show authors
+  QTextBrowser *trBrowser; // to show translators
+
+  int prevTab; // previously selected tab
+
+  std::mt19937 rng {std::random_device{}()}; // random number generator
+
+public slots:
+  void currentChangedSlot(int index); // tab selection changed
+
+};
+
+#endif
diff --git a/qucs/qucs/qucs.qrc b/qucs/qucs/qucs.qrc
index 4838bdc895..33e2226cdd 100644
--- a/qucs/qucs/qucs.qrc
+++ b/qucs/qucs/qucs.qrc
@@ -235,5 +235,6 @@
         <file>bitmaps/tick.png</file>
         <file>bitmaps/error.png</file>
         <file>bitmaps/mutualx.png</file>
+	<file>bitmaps/hicolor/128x128/apps/qucs.png</file>
     </qresource>
 </RCC>
diff --git a/qucs/qucs/qucs_actions.cpp b/qucs/qucs/qucs_actions.cpp
index 91cadc115c..31c228b3c5 100644
--- a/qucs/qucs/qucs_actions.cpp
+++ b/qucs/qucs/qucs_actions.cpp
@@ -55,6 +55,7 @@
 #include "dialogs/loaddialog.h"
 #include "dialogs/importdialog.h"
 #include "dialogs/packagedialog.h"
+#include "dialogs/aboutdialog.h"
 #include "module.h"
 
 // for editing component name on schematic
@@ -1595,3 +1596,10 @@ void QucsApp::slotBuildModule()
     messageDock->msgDock->show();
 
 }
+
+// ----------------------------------------------------------
+void QucsApp::slotHelpAbout()
+{
+  AboutDialog *ad = new AboutDialog(this);
+  ad->exec();
+}
diff --git a/qucs/qucs/qucs_init.cpp b/qucs/qucs/qucs_init.cpp
index 2f28da7caa..a68d1305ce 100644
--- a/qucs/qucs/qucs_init.cpp
+++ b/qucs/qucs/qucs_init.cpp
@@ -1054,46 +1054,3 @@ void QucsApp::slotToggleOctave(bool on)
   viewOctaveDock->blockSignals(false);
 }
 
-// ----------------------------------------------------------
-void QucsApp::slotHelpAbout()
-{
-  QMessageBox::about(this, tr("About..."),
-    tr("Qucs Version")+" "+PACKAGE_VERSION+
-#ifdef GIT
-    " ("+GIT+") " +
-#endif
-    "\n"+
-    tr("Quite Universal Circuit Simulator")+"\n"+
-    tr("Copyright (C)")+" 2003-2009 "+
-    tr("by Michael Margraf")+"\n"+
-    tr("Copyright (C)")+" 2011-2015 "+
-    tr("Qucs Team")+"\n"+
-    "\nThis is free software; see the source for copying conditions."
-    "\nThere is NO warranty; not even for MERCHANTABILITY or "
-    "\nFITNESS FOR A PARTICULAR PURPOSE.\n\n"+
-    tr("Simulator by Stefan Jahn")+"\n"+
-    tr("VHDL simulator 'FreeHDL' by Edwin Naroska and Marius Vollmer")+"\n"+
-    tr("Special thanks to Jens Flucke and Raimund Jacob")+"\n"+
-    tr("Many thanks to Mike Brinson for correcting the VHDL output")+"\n"+
-    tr("GUI improvements by Gopala Krishna A")+"\n"+
-    tr("Verilog-AMS interface by Helene Parruitte")+"\n"+
-    tr("Verilog-AMS dynamic loader by Guilherme Brondani Torri")+"\n\n"+
-    tr("Translations:")+"\n"+
-    tr("German by Stefan Jahn")+"\n"+
-    tr("Polish by Dariusz Pienkowski")+"\n"+
-    tr("Romanian by Radu Circa")+"\n"+
-    tr("French by Vincent Habchi, F5RCS")+"\n"+
-    tr("Portuguese by Luciano Franca, Helio de Sousa, Guilherme Brondani Torri")+"\n"+
-    tr("Spanish by Jose L. Redrejo Rodriguez")+"\n"+
-    tr("Japanese by Toyoyuki Ishikawa")+"\n"+
-    tr("Italian by Giorgio Luparia and Claudio Girardi")+"\n"+
-    tr("Hebrew by Dotan Nahum")+"\n"+
-    tr("Swedish by Peter Landgren")+"\n"+
-    tr("Turkish by Onur and Ozgur Cobanoglu")+"\n"+
-    tr("Hungarian by Jozsef Bus")+"\n"+
-    tr("Russian by Igor Gorbounov")+"\n"+
-    tr("Czech by Marek Straka")+"\n"+
-    tr("Catalan by Antoni Subirats")+"\n"+
-    tr("Arabic by Chabane Noureddine")+"\n"+
-    tr("Kazakh by Erbol Keshubaev"));
-}