CodeDrop allows you to easily create Gists on GitHub right from your desktop.
Just drag and drop a file or snippet of text onto the CodeDrop icon in the menu bar to get started. With CodeDrop, you can upload both public and private Gists.
Once an upload completes, you'll get a notification. A link to the Gist will also be placed on your clipboard, so sharing it with others is just a paste away.
- Compatibility fixes
Pixen - pixel art editor 
Archimedes 