When Google introduced two-factor authentication for the Google and Google Apps accounts, they also created a pluggable authentication module (PAM) for Linux. This is great news for people running Linux servers who want to protect their remotely-accessible SSH accounts with two-factor authentication. For free
http://www.techrepublic.com/blog/opensource/two-factor-ssh-authentication-via-google-secures-linux-logins/2607

TileMill is an application for making beautiful maps. Whether you’re a journalist, web designer, researcher, or seasoned cartographer, TileMill is the design studio you need to create compelling, interactive maps.
http://mapbox.com/tilemill/

Welcome to Simple:Press – the feature rich, completely integrated and fully scalable forum plugin for WordPress.

Highly customizable, Simple:Press packs the features of a standalone forum into a plugin – seamlessly turning your WordPress site into a community.
http://simple-press.com/