SkyLlian is a free Skype plug-in avoids two contact lists when using Trillian and Skype. Your Skype contacts are shown in your Trillian contacts list and you can interact with them: call them, send messages, take a call, even call your SkypeOut contacts. But remember,even though Skype maybe free, trillian is not!!

Via JKOnTheRun Blog

The site is down but the direct download link is- http://www.meinskype.de/downloads/SkyLlian.1.6.4_Setup.exe