Wasabi is a desktop wallet developed by Adam Ficzor, the maker of HiddenWallet. However, Wasabi is more than just a rebrand of HiddenWallet. As Ficzor explained during his Building on Bitcoin talk, the wallet has been rewritten from scratch to add a variety of new features.
Wasabi prevents blockchain analytics firms and other would-be snoopers from spying on your bitcoin transactions by automatically “mixing” your coins with other users’ funds when you initiate a transaction. This makes it much more difficult for an observer to decipher the sender and recipient of specific payments. Unlike with some mixing services, Wasabi accomplishes all of this without the help of a centralized coordinator, ensuring that there is no single point of failure.
You can read more about Wasabi and its privacy features at: http://bit.ly/2KA95Qa.