Alternative software

Anime/video

Memento: An mpv-based video player that includes Yomichan-like dictionary lookup integrated right within the subtitle overlay as well as Anki support.
Animebook: An in-browser video player which allows easy Yomichan lookups and Anki card enhancement.
asbplayer: A browser-based media player for subtitle sentence mining. Supports various video streaming websites directly.
japReader: A pop-up dictionary program that can track known words.

mokuro: Takes manga images and generates HTML files where detected text blocks are overlaid with selectable text as recognized by “Manga OCR”, allowing for direct lookup with pop-up dictionaries.
Mangareader: An in-browser manga reader with built-in support for OCR-ing selected regions using an online API backed by “Manga OCR”. Can be used in tandem with Kamite with the help of the Clipboard Inserter browser extension.
Cloe: OCRs a screen selection to clipboard using “Manga OCR”.
Poricom: Manga reader with built-in “Manga OCR” and Tesseract support. Can also be used to capture text from external programs.
JL: A pop-up dictionary program for Windows with a convenient translucent UI that can be displayed on top of other windows. For manga, needs a separate program that can OCR to clipboard.
japReader: A pop-up dictionary program that can track known words. For manga, needs a separate OCR-to-clipboard program.
transformers_ocr: A simple Linux/Xorg OCR-to-clipboard script using “Manga OCR”.

Kamite’s own Region OCR is provided as an alternative to Textractor for games. Some other alternatives are:

Game2Text-Lightning: A Windows OCR-powered pop-up dictionary program for games and other desktop applications.
JL: A pop-up dictionary program for Windows with a convenient translucent UI that can be displayed on top of the game window. Needs Textractor with Copy to Clipboard extension or an external OCR-to-clipboard program.
japReader: A pop-up dictionary program that can track known words.