Pen Pals vs Rethink.
A side-by-side look at Pen Pals and Rethink.. For an in-depth review of either product, follow the links below.
Pen Pals
Social & Communications
Pen Pals is a pen pal matching service that connects people from around the world to become pen pals. It helps facilitate meaningful friendships via written correspondence.
pen-palsletter-writinginternational-friends
Rethink.
Databases
Rethink is an open-source database management system that supports JSON documents and real-time push queries. It has a query language that allows you to query, join, and aggregate data easily.
jsonrealtimeopen-source
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