AlsaModularSynth is a realtime modular synthesizer and effect processor. It features
- MIDI controlled modular software synthesis
- Real-time effect processing with capture from e.g. "Line In" or "Mic In".
- Full control of all synthesis and effect parameters via MIDI.
- Integrated LADSPA Browser with search capability
- JACK Support
Some links for patches:

Software type
ALSA
JACK
Platform
GNU/Linux
Software features
NSM
Modular
MIDI
CV
Synthesis
Audio input
Audio mixing
Audio FX
Software language
C++
License
GPL-2
Developer(s)
Guido Scholz