The main purpose of the digital certificate is to ensure that the application belongs to the entity to which the certificate was issued. The Cerulean Studios digital certificate does not guarantee that a signed application is safe to run, but rather informs the user that the software was digitally signed by Cerulean Studios and verified by a trusted Certificate Authority (CA).
If it isn't enough to chat with friends from Google, MySpace IM, Skype, and Facebook, as well as AIM, ICQ, MSN, Yahoo, and IRC on Trillian't multinetwork IM app, you can comfortably count the app's deep hooks into Twitter and Facebook alerts and checking e-mail (both POP3 and IMAP varieties) as reasons for switching from your current messenger. Cerulean Studios is a software house based in Connecticut, United States, notable for developing Trillian, an instant messaging client. It was founded in May 1998 by Kevin Kurtz and Scott Werndorfer. They built a freeware multi-protocol IM program called Trillian. The first version of Trillian was released on July 1, 2000. On September 10, 2002, a commercial version, Trillian Pro, was added to the company's lineup. Cerulean has promised to continue to support and maintain a free version of Trillian, which will remain a closed-source application. www.trillian.im
About (from Cerulean Studios at www.trillian.im)
“Trillian is a free fully featured, stand-alone, skinnable chat client that supports chatting on Windows Live, Facebook, Yahoo, MySpace, AIM, Email, Google Talk, Skype, ICQ, Jabber, IRC, and Bonjour. It also helps manage your social networks such as Facebook and Twitter. Trillian provides capabilities not possible with most original network clients, while supporting standard features such as audio and video chat, file transfers, group chats, buzzing, tabbed chats, tablet-based drawing, message history, plugins, avatars, multiple simultaneous connections to the same network, typing notifications, proxy support, and encrypted messaging.”