Instant Messaging:
digsby is a multiprotocol IM client that lets you chat with all your friends on AIM, MSN, Yahoo, ICQ, Google Talk, and Jabber with one simple to manage buddy list.

Email Notifications:
digsby is an email notification tool that alerts you of new email and lets you perform actions such as 'Delete' or 'Report Spam' with just one click.

Social Networking:
digsby is a social networking tool that alerts you of events like new messages and gives you a live Newsfeed of what your friends are up to.

Editors note: This is the clean install. A smaller download is available that bundles malware, so be careful.