App.net for your Mac.
Kiwi focuses on the path of the real conversation and moves the chatter to the side.
App.net is great for private chats too. With Kiwi you'll manage your private messages with ease.
Keep your Twitter friends in the loop with Twitter crossposting. Set up once and forget it.
See all your mentions and followers in a single timeline or keep them separate, it's up to you. More Info »
Close your mobile client and pick up your stream in Kiwi exactly where you left off.
A Great Read
More whitespace, high contrast content, and beautiful retina type make App.net's longer posts look great.
Unobtrusive UI keeps out of your way and lets you focus on the content instead of the buttons.
Kiwi lets you assign two or three finger swipe gestures to navigate your timelines and jump between tabs.
Navigate, post, drill-down, and nearly every other feature in Kiwi can be driven from simple keyboard commands.
And so much more
Image posting, global timeline, inline images, username autocomplete, global hotkeys, notification center support, hashtag search, user lookup, and so much more that we can't fit it all here.