Metalsmith : An extremely simple, pluggable static site generator.
Retromat : Planning your next agile retrospective? Start with a random plan, change it to fit the team's situation, print it and share the URL. Or browse around ...
Inj3ct0r 1337day.com : Exploit database separated by exploit type (local, remote, DoS, Poc, etc.)
YAML Builder : A tool for visual layout development of YAML based CSS layouts
Gophercises : FREE coding exercises for budding gophers