During the communications it is often necessary to capture the screen, add arrows and text to the screenshot and finally share the link. There are lot of the programs this kind but most of them have all or some of these problems: no direct links, terrible UI, slow or paid storages, do not support Mac Os X.
As the Mac OS X developer we spent about 2 weeks to implement another screen capture program called Tinge having no drawbacks above and able to run on 10.6.8 version of Mac OS X.
Because we did it for ourselves and the project has not been sponsored by anybody it is available as an open source project.
The code is pretty straightforward although contains some interesting fragments related to the capture screen “as is” in the moment of hitting the hot keys – some others programs let the menus to close that we could not afford.