Annotable - Ultimate image annotation & markup tool

Chipit - Store and tag all your screenshots.

Hover Me - Hover me lets you quickly annotate any image and easily integrate an interactive version within your own website.

Josh Parnham - Software Developer and organiser

Picsell.ia - Annotate datasets smarter, 10x faster & cheaper.

Yoink - Yoink is a website that makes it easier to drag and drop images and text from one screen to another. It's a straightforward site with help along the way if you aren't sure about dragging and how to place your content.