Danny HavenithThings I've Built
The fastest AVR digital pin functions in the West
Library that implements digitalWrite/Read, but that executes these functions in 2 clock ticks instead of Arduino's 50+ clock ticks. Also allows writing something like "digitalWrite( led1 | led2 | led3, HIGH);", changing 3 AVR pins in 4 cycles.
Digital hi-hat pedal replacement
Using an attiny13 and a hall effect sensor to replace the analog guts of the Roland FD-8 hi-hat pedal.
Yet another WS2811 library
The smallest possible codebase that delivers clock-tick-correct WS2811 timing from an 8 Mhz AVR. Also available in a version that controls 80+ LEDs from a 64 byte RAM attiny13. See this for an example.
Arcadia Labs
Dan
conradcn
Xark
Timothy Woo
jaromir.sukuba
Kumar, Abhishek
Eviscerate Core
nfk
DigiGram
Emerica
CeKaGe
Polectron
Richard Hogben
Albert Latham
Julian Labuschagne
Kyle