Joxi

Very handy service to create and publish screenshots online! You can capture the screen or any part of it, and what it really differs this tool from standard graphics editing software is that you can add texts, arrows and use some effects online and immediatelly publish it, without the need to paste the screenshot to your software, to upload it etc. The tool is perfect for freelancers and their clients, the only thing I dislike is that recently they added a bit heavy advertisements to the pages, published from free accounts. But anyway it's a great tool!