Items starting with R
R (programming language)
Software environment for statistical computing & graphs.
Rackarrack
Though Linux users have access to multiple plugin formats, they are not actually necessary, thanks to the JACK, a low-latency sound server daemon that allows interconnection of audio and MIDI from different programs. Rackarrack is just such a program.
Rosegarden
Another DAW initially developed for Linux and now in alpha for Windows, too, Rosegarden is a fully realised MIDI and audio workstation with all the trimmings.