Do you ever wanted to record some part of your screen as a GIF image? I wanted many times - to show that new cool feature, how to reproduce bug, etc. Sadly, I had problems to find proper tool. I tried ImageMagick, but shell command just isn't a proper way to record screen. Recently, friend told me about a very small, but useful program called Peek.
It looks like this (screen made using Shutter)
You just move window to part of the screen that you want to record, resizing if needed, and click "Record".
This is an example how it works - pretty slick!
Quality is "good enough" for a fast demo, so it covers 99% of my use cases :) Here you can find installation instructions.
Hope I helped someone :)