KShare

The free and open source and cross platform screen sharing software

Awesome Screenshot

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and…

Free web and desktop application that enables quick screen grabs, easy URL-based sharing, and live, multi-person drawing and sketching.

Droplr is a tiny application that aims at helping people share things easier.

Your screenshots are automatically uploaded on your web storage.

Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

Liszt is a simple that lives in your menu bar.

Upload one file of 400 megs or less to multiple free file hosts – 14 at most. 25 possible hosts.

Multifile mirror is a file mirroring website.

Take screenshots and record video from your screen

NoCap makes sharing your files and screenshots fast easy.

Share what you see with the rest of the world.

ShareX is a free and open source program that lets you capture or record any area of your screen…

Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image

Swiftdrop is a super simple cloud sharing app for Mac.

Upload, get URLs to share.