From YourHead Software:
Kiwi likes to spend a lot of time on your desktop, so we made sure he would fit in. Choose a theme or build your own -- it's easy.
Kiwi can show one minimalist timeline for the social media Zen master, or display lots of accounts for the social networking butterfly.
Kiwi can manage your tweets with rules and regular expressions, plus he can combine Twitter accounts to create personalized timelines.