Erlang QuickCheck - - A library for random testing of Erlang programs against specifications.
Erlang to mCRL translator - - Software written in Erlang for translating Erlang source code to mCRL process algebra specification. The software makes industrial code available for research tools.
Inets mod_xsl - - An XSL transformation module for the Inets erlang webserve.
mod_erl - - Module for Apache. It lets you use Erlang as an embedded language, just as PHP.
XML Parser - - An experimental XML parser in Erlang.
Yxa - - A bunch of library like functions for receiving, processing and sending SIP messages, and a couple of small applications that can do various things.