Free: Mehdoh - Twitter client for Windows phone with Instagram account support.

Mehdoh is a nice Twitter client for Windows Phone and Windows Phone 7.x. The app is currently free, so go get it now as I doubt it will  remain so for long. Mehdoh is fast compared to the other Twitter clients I use on my HTC 8X and supports Instagram account.

Features:

- Multiple twitter account support. 
- Instagram account support (feed/popular/profiles/searching). 
- Soundcloud account support (with background audio player!)
- Twitter Streaming (real-time feeds).
- Twitter Lists. 
- Lock screen notifications and live tile (WP8 only)
- Lock screen wallpaper (WP8 only)
- Voice commands (WP8 only)
- Inline media previews.
- Image / website previews in the app
- Fully customisable layout. An amazing new clutter-free photo timeline... the list goes on! 
- LOTS more features and fully configurable.

Download: Windows Phone Store