Finally a freeze-frame screenshot.

After using Greenshot for Windows, I looked for something similar for Mac earlier this year. I didnt like how all the mac screenshot capture/editors always had a live view of the selection. I do a lot of screenshots for web design and mockup and wanted an app that would freeze the screen before making any selections -- perfect when wanting to use a screenshot with a particular animating slide for instance, instead of having to wait and hope that you snapped it at the right time.

Pros:
- FREE!
- Simple to use.
- Freeze-frame capture.
- Social options.

Cons:
- No image quality control, no file format selection, nor download options [auto-save/copy, screenshot folder]
- No client-side annotation (instead it links to a web service that allows you to do that)
- GUI aesthetic feels dated and rough; since this is free, I wouldnt say its terrible as it still is functional, but alongside polished mac apps it clearly lacks the fine polish that makes Mac apps pop.

Bugs:
- When using dual monitor, a freeze-frame capture of both monitors are squeezed into one, making this particular app a bit useless for now.

Kerry T Johnson about Lightshot Screenshot