1. XEEBER - The best and easy way to detect your buddy is XEEBER. With Xeeber you can discover who is online available at yahoo messenger and who is invisible.
2. Invisible.ir is a website for Yahoo! Messenger status checking. With invisible.ir you can now bypass Yahoo! Messenger's Invisible Settings with ease. With its quick and intuitive interface invisible.ir offers you the ability to see if your friend is truly online or if they are invisible.
3. Invisible-scanner.com-Invisible-scanner.com is a new webtool which also help you to find the Invisible user and also let you know which Avatar he is Using.
4. 4invisible.com is a website from where you can find invisible people in yahoo! messenger with their avatar.
5. Imvisible - IMvisible is one of the fastest free Yahoo Messenger invisible detectors.