For faculty, staff, and graduate students:
Lync is part of Unified Communications. Lync teleconferencing allows you to use your Lync account to create or attend teleconferences.
To find out whether you have a Lync account enabled, use your NetID and AD password to log in to MyUC.
More information on using Lync teleconferencing is available at UC Help: Using Lync.
Google Hangouts (Google Apps @ Illinois)
For undergraduate students:
If you are an undergraduate student or a transfer student, you are eligible to create a Google Apps @ Illinois account.
See Getting Started with Google Apps @ Illinois for help getting started.