MongoDB in production
http://blog.boxedice.com/mongodb/

ASKKEN is visual data browsing powered by Freebase
http://askken.heroku.com/

Redmine plugin turns it into and Hoptoad server
https://github.com/yeah/redmine_hoptoad_server

initr
Redmine plugin that turns it into an Puppet provisioning facility
https://github.com/descala/initr