Fountain Greetings - Handwritten cards. Curated gifts. Right at your fingertips.

LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.

Thankster - Automagically send hand written cards

Ruby Toolbox - Explore and compare open source Ruby libraries

Bond - A simple app that reminds you to keep in touch with people

GitNews Web - Trending repositories from GitHub, HackerNews & Reddit