Another minimal one I spotted this morning is http://dietpi.com/ - UK-based developer. Needs a 1GB card but compares very favourably to standard distro: https://docs.google.com/spreadsheets/d/1mDHGZC-H6tU6_O8kuLTG8d4A8Nt7lV1Q7MXTR_6qw30/edit#gid=0
@conor started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Another minimal one I spotted this morning is http://dietpi.com/ - UK-based developer. Needs a 1GB card but compares very favourably to standard distro: https://docs.google.com/spreadsheets/d/1mDHGZC-H6tU6_O8kuLTG8d4A8Nt7lV1Q7MXTR_6qw30/edit#gid=0