Haystack Search - Haystack helps you make the most of your time, by searching all your files and documents in the cloud in one place. It's been built for privacy from the ground up, so your data isn't stored on a server, just your computer.

PenPal World - Connect with people all over the world

MailJack+ - Send PDFs as postal mail

InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.

Paperkit - Create and download custom graph, lined, or dot grid paper

Polyglot Club - Polyglot Club is a new social network for language learners.