Reverse Dictionary - Describe a concept and get back a list of words
Topia - Create amazing wallpapers for your iPhone
Silicon Valley Dictionary - Urban dictionary meets Silicon Valley
Gather Town - Spatial video-chat worlds for work and play
Dictionary Anywhere - Dictionary Anywhere is an open-source and easy-to-use browser extension for Mozilla Firefox and Google Chrome that allows you to check definitions easily while browsing the web.
VRChat - Create and play in virtual worlds with others