Monosnap - Monosnap is a comprehensive screenshot taking software system that provides users with a fast and accessible way to take screenshots whenever they want. Read more about Monosnap.
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Annotate - Annotate (formerly know as Glui) is the simplest way to capture, annotate and share screenshots.
Dropbox - Online Sync and File Sharing
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