Klipper is a 3d-printer firmware

Baresip is a modular SIP User-Agent with audio and video support

MQTT library for Arduino

Arduino telescope goto for equatorial and alt/az mounts

Raspberry Pi motion vector detection program with OSD web interface.

Custom firmware for Geiger counters/radiation meters (FS2011, Bosean FS-600, FS-1000, FS-5000, FNIRSI GC-01)

Atmega328p-based 1200 Baud AFSK radio modem

Spirit2 Free : Open Source Real FM Radio for Android 4.1-5.0+

Search for USB devices by VID/PID, gets device serial numbers

sdm120c ModBus Mini Smart Meter

SimH simulator emulator fork with Control Panels and Visual devices. IBM 650, IBM NORC, IBM 701, IBM 360, SWTPC 6800, Ferranti Mark I, HP 2100

General purpose firmware for MicroModem with forward error correction and larger packet sizes