Recommender Systems (open-source)

This list contains most of the non-SaaS recommender systems that are open-source.

Email Clients (android)

Android apps to send and receive emails.

File Compression (tools)

GRE Preparation (sites)

MBTI Dating

Dating sites for MBTI fans and enthusiasts. Find out which MBTI personality matches you best on these MBTI based social networks and dating sites.