Double Commander is a cross platform open source file manager with two panels side by side. It is inspired by Total Commander and features some new ideas.
A cross-platform file and folder mass renamer. Easy to use and to learn. Features: read new names from text files; insert, replace and remove strings; numbering; case-change; real-time preview; interactive tutorial; order files in different ways.
DuMP3 is a duplicate and similar file finder. It finds exact duplicate binaries by hash, similar text files by substring content, images (JPG, BMP, GIF, PNG, etc) by color and audio files (MP3, WAV, OGG, etc) by wave data. Future: fonts, video.