This is a very basic tutorial I made awhile back on how you can make .GIF’s for Tumblr or various other things without having to use PS (Photoshop).
Things you will need:
GIF Brewery: http://gifbrewery.com/
This app can be found for free through various torrent sites if you give it a quick Google. However I do not recommend this, support the developer. Also I will not be held responsible if you manage to download a virus.
If you’re having any problems; Feel free to drop comments below.