+ Gyach-E can log on with invisible mode (Gaim can't do)
+ Gyach-E can voice chat others (Kopete and Gaim can't do)
+ Gyach-E supports web cam (Gaim can't do)
+ Gyach-E can show popup when someone logs on and logs off (Kopete and Gaim, again Gaim, can't do)
+ Gyach-E can show popup when receives a new mail (with a voice message) (Gaim can't do)
+ Gyach-E supports to open your Yahoo! Mail directly from Gyach-E (Kopete and Gaim can't do)
+ Gyach-E can detect an user is invisible if he's online then change status to invisible (nice feature, huh?)
+ Gyach-E can keep connection really well (Try to log on to your account by another computer, it will be out immediately)
If you only need to chat with other YM users, Gyach-E is for you.
(I will provide more when I found any nice features Gyach-E can do)
How to install Gyach-E? (Thanks endersshadow)
1. Download http://www.politicalcrossfire.com/temp/enderavsig/gyach-install.tar.bz2, and save it to your home directory (important!).
2. Run these commands in the terminal, in sequential order:
tar -xjf gyach-install.tar.bz2
Now try to run Gyach-E by "gyach" at terminal console.
Note: Maybe you need to install libtldl package to run Gyach-E.