WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Send Anywhere - Send whatever you want, wherever you want
Snagit - Screen Capture Software for Windows and Mac
Dropbox - Online Sync and File Sharing
LightShot - The fastest way to take a customizable screenshot.