ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Wikisend - Wikisend is a free online file and documents sharing administration that gives you a chance to share documents on the web.
Thum.io - A real-time website screenshot generator
Files2U - Files2U is free to use web service that permits you to share documents on the web.
Blink - Blink is a team and employee app, with a Feed, Chat and Hub (for documents, links, files).
Ge.tt - The best way to publish and share your files.