I'm searching for a good Twitter application for Windows 8.

Requirements:

• Runnable under Microsoft Windows 8 (obviously ;-))
• Ideally runnable on Windows 10 too, as it will be released soon
• Aware of multiple accounts (whether if I need to change the current user scope or if I'm able to select which I want to use for the next tweet)
• Show all Twitter related stuff like mentions, messages, etc.
• Metro awareness is nice to have
• Ideally actively developed, as I won't change the application after the next API change