AlsaModularSynth is a realtime modular synthesizer and effect processor. It features MIDI controlled modular software synthesis, realtime effect processing with input capture, full control of all synthesis and effect parameters via MIDI, an integrated LADSPA browser with search capability, and JACK support.
Khronosphere is an audio recording tool. Its special feature is a buffer that keeps capturing audio even before the actual recording is started. This enables the user to prospectively catch any interesting sound that normally would have been lost. The buffer size is freely definable by the user. The software itself places no restrictions; the only limits are the resources of the host system. Khronosphere is very similar to and inspired by Jack Time Machine. They both have the same basic concept, but Khronosphere supports larger buffer sizes.
QJackRcd is a simple Qt application that records JACK server outputs. It was designed to record audio from tape, with an automatic split/pause feature. It aims to provide for simple stereo recording needs with a minimum of configuration. It natively manages silence by threshold and activation time. Silence events can be used to pause the recording or to split files. It can optionally post-process each file after recording is complete.