There are some great free/open source apps I didn't found in PortableApps. I would be happy to see them.
1. Double Commander - open source multi-platform two-panel file manager (best replacement for Total Commander). There is official portable version.
2. XMedia Recode - free video and audio transcoding program. It can convert youtube weba-files (fre:ac in PortableApps can't). There is official portable version.
3. HandBrake - open-source transcoder for digital video files. There is official portable version.
4. FB Editor - free FB2 ebook editor.
5. TagScanner - free and powerful audio tag editor. There is official portable version.
6. Screamer Radio - free internet radio app.
7. STDU Viewer - VERY compact and useful free viewer for PDF, DjVu and other file formats. There is official portable version.
8. Audacious - crossplatform and open-source audio player