Active CSS
Rob Galbraith
River Zend Dynamics

Logo design
Jesse Wilson
beyondmedia.co

Observable Slim plugin
Elliot (ElliotNB)

Recursive Diff plugin
Anant Shukla (cosmicanant)

CSS parsing idea
Aram Kocharyan (aramk)

Positive comments
Håkon Wium Lie (Original inventor of CSS)
Joseph Orbegoso Pea (WICG)
Matthew Phillips (WICG)