ReOrganize4L is a tool for rearranging the files on an MP3 stick. It is based on ReOrganize! for Windows and supports many devices. The main idea behind it is that most MP3 sticks sort the tracks by date. ReOrganize4L first copies the tracks to a temporary directory on your hard drive, then rearranges the order of the files. After this, it copies the tracks (with the new order) back to the stick.
kMPIO provides a GUI interface to access Digitalway/Adtec digital audio player MPIO (DMG, DMK, DME, ...) players under Linux. It depends on the mpio library to perform hardware access. kMPIO can upload and download files as different file types, create directories, format internal and external memory, and rename and delete files. ID3 tags are supported.
gtk123 is a frontend for mpg123, mpg321, and other mp3 players that use the same command-line format. It should be possible to use gtk123 in situations where most other MP3 players would be ineffective due to lack of CPU power. gtk123 is being developed and tested on a 486DX4/75 laptop. On such a system, it can be somewhat unresponsive when decoding VBR, but CBR works well (at least in mono mode).