Windows visual diff and merge for files and directories
antigift is simple cross-platform, files & folders encryption tool
Source code is here - https://sourceforge.net/projects/lcmd-git/
minix3 DECO file system browser for book_ISO_3_1_0
easy to use, powerful and completely free document management software
Dopus5 for all Amiga platforms (AmigaOS3, AmigaOS4, MorphOS and AROS)