Plgen (Playlist Generator) is a tool that sorts files for MP3 players in a user defined order. Cheap MP3 players often come with no playlist capabilities. In addition these players often make use of the FAT16/32 file system, leading to confusion when the playing order is not alphabetical on the device even though it is shown as alphabetical in the file explorer.
Opensort is general purpose sorting software that aims to be a fast and easy solution for the sorting of large or small data-sets and data manipulation in general. It is still in the early stages of development and lacks many of the advanced features its commercial counterparts have. For the moment, it only provides a simple command line interface and a C library other programs can use to cover some basic needs for data sorting.