...The retro "beep" sounds reminiscent of old video game consoles and vintage PCs will take you back to the 8-bit era.
You can shape your sound with waveforms - square, sawtooth etc. - and add LFO, delay and volume envelopes. Enjoy the 80's-ish synth drums, also!
Demo songs:
https://www.youtube.com/watch?v=qB6FUTQ5Oz4&list=PLXBNhaAeM7Lxf7ysrFzYFwPYRZM1JCrZr
SoundCloud: https://soundcloud.com/beepcomp
Orfium: https://www.orfium.com/profile/beepcomp/
What your music composition will look like:
https://sourceforge.net/p/beepcomp/code/ci/master/tree/userdata/
(Similar to MML)
Your First Tutorial:
http://hiromorozumi.com/beepcomp/learn.html
User's Guide:
http://hiromorozumi.com/beepcomp/documentation/beepcomp_users_guide.html
KGuitar is powerful KDE-based music tabulature editor with support of guitar, drums, classic note scores, MIDI synthesizer output, chord, scales, modes, melody and rhythm construction and analysis tools, lots of tab effects, Guitar Pro files import.
...is an interactive sampler backend (GPLv3), plays ogg-vorbis-samples to sound
device, sample rate conversion, channel abstraction, controlled via stdin/out,
on demand decompression, easy understandable source. Targets: *nix and win32
via cygwin.
Drunky drummer is a real-time sound samples player, specially designed for live practice of electronic drums. It will be available on Mac OS X, Windows and Linux platforms.
Little GUI - Jazz - Practice - Program, which plays a bass, drums and piano track based on a given set of chord changes and probabilities. Uses TSE3 for midi code and gtk+ for GUI.
generates a jazz-swing bass, drums, and piano track to accompany your playing.. uses the available Midi-Devices through OSS. There's a new version out (with GUI). See project home page for a link.