Itsy is small, lightweight and simple Twitter app for Mac. Itsy Twitter app is compact and streamlined in both: form and 
function. But do not mistake it by its looks. Itsy includes every function expected from a useful Twitter app: it includes a time-line, a built-in search function, support of @ mentions and direct messages.
As quoted from the official developer website Mowglii:
Itsy won’t hog up your screen or do other crazy things.
- See and send tweets, replies, DM’s
- Mentions integrated into timeline
- Inline Yfrog and Twitpic viewing
- Growl notifications
- Twitter Search
But when we shelved deeper into its functions, we found that it does not support built-in event notifications, instead it uses the Growl framework to display notifications. Also there is no function to access the latest trending topics. If you want to follow someone or make changes to your Twitter profile, it opens up regular browser interface of Twitter in a web browser.
A nice feature of Itsy is the display of images from services like Twitpic, right in your timeline.
So, if you want a simple, slim, low on memory and non-distracting Twitter client for your Mac, Itsy is the right app for you.
