A lot of designers spend a lot of time with creation and sharing of screenshots with a colleague or showing to a customer recently created muckup.
I found Floomby - the simple way to share screenshots and files.
You can edit screenshot before publishing by special graphical tools: pen and
marker. When screenshot is uploaded you will get the link on it which you can send by E-mail or by IM or publish on blogs/forums.
To start using Floomby you should download Floomby Agent (2 Mb) first.
Official site: http://floomby.com
