Museum for Miranda IM 111 Pack source code and latest installer (v0.9.40.0). I don't remember when it was released but Miranda IM v0.9.40 was released on 2011-12-31 and Miranda IM v0.9.41 was released on 2012-01-09.
The installer has an option of creating a folder with source code. You can also open miranda_im_111.exe with 7zip and find source code in $DESKTOP\Miranda IM 111 Pack Source Code folder. See license info there and in installer dialogs.
Actually it's a source code for the pack but not for the Miranda IM and plugins. See their source code on the Miranda IM site (at sourceforge.net).
Screenshots and info:
- Russian site: Miranda IM 111 Pack;
- English site: Miranda IM 111 Pack;
- Other Miranda IM posts.
- If sites are down or images are absent see museum.
P.S.
I guess it can be ported to Miranda NG or the current version of Miranda IM (they might be useful Jabber clients that support encryption and GPG - check it yourself). But I have no intension to do so.