Salsa - Anonymous messages in your workplace
Flickr - image and video hosting website
Bebop - Bebop provides a nice web interface to a list of publications stored in a BibTeX file.
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Flaneer - Flaneer provides Virtual Machines for Game Studios, Post-Production video agencies and Engineering companies. Make Unreal Engine, Premiere Pro and Revit way faster and collaborate on projects with your team !
Google Photos - All your photos are backed up safely, organized and labeled automatically, so you can find them fast, and share them how you like.