Hydra, the Nix-based continuous build system [maintainers=@dasj,@Ericson2314]

Efficient library for manipulating zip archives

Lua in Erlang

A virtual machine for executing programs written in Hack.

Immutable persistent data collections for Javascript which increase efficiency and simplicity.

Zotonic's fork of Basho's webmachine

Zotonic - The Erlang Web Framework & CMS