Description:
Aria Maestosa is an open-source (GPL) midi sequencer/editor. It lets you compose, edit and play midi files with a few clicks in a user-friendly interface offering score, keyboard, guitar, drum and controller views.
Graphics and Media
MusE Sequencer
Description:
MusE is a digital audio workstation with support for both Audio and MIDI
PikoPixel
Description:
PikoPixel is a free, open-source Mac application for drawing & editing pixel-art images. PikoPixel also runs on other Unix-like platforms (Linux, BSD), using the GNUstep framework.
Cecilia
Description:
Cecilia is an audio signal processing environment aimed at sound designers. Cecilia mangles sound in ways unheard of. Cecilia lets you create your own GUI using a simple syntax. Cecilia comes with many original built-in modules and presets for sound effects and synthesis.
Hydrogen
Description:
The advanced drum machine for Linux, macOS, and Windows
gRainbow
Description:
A synthesizer that uses pitch detection to choose candidates for granular synthesis or sampling.
Footage
Description:
Trim, flip, rotate and crop individual clips. Footage is a useful tool for quickly editing short videos and screencasts. It’s also capable of exporting any video into a format of your choice.