Pwytter is a free Twitter client for Windows, Mac & Linux, Pwytter is a standalone Twitter client written by Pierre-Jean Coudert.

It's a free/open source software licenced under the GNU GPL. Pwytter is written in Python / tkInter and is multi-platform.

Pwytter Features
1. Support Multi OS / Windows / Mac OS X / Linux
2. Timeline switch : User, Friends, Public, Replies, Direct messages, "Composite"
3. Compact UI
4. Full Unicode support for all languages.
5. User interface translated in 14 languages: Simplified Chinese, Traditional Chinese, English, French, German, Italian, Japanese, Polish, Romanian, Serbian, Swedish, Spanish, Portuguese, Russian
6. Friends and Followers list display
7. Easy Replies and Direct Messages
8. In message URL detection
9. Image and request caching for fast UI response
10. Automatic and manual refresh
11. Pwytter update autodetect

The license of this software is Freeware, you can free download and free use this social networking software.