hi
do you know any software or site to analyse games with friends? I mean, unlimited takebacks, creating new variations and write them to pgn, with chat etc.. in fact normal otb analyse, but on-line . (except chess.com)

Thanks

I need that all players can move and show variations, not just one.

Use the "Insert board or position" feature to message each other diagrams with variations here on chess.com.  Or you can open a thread in a group forum to post diagrams to.

Thats too slow and difficult, I want something live and easy.

ChessEdu and Chess Tutor sound like they might be what you are looking for.

Sorry, but I'm confused, what this applicatios are? Where I can download them? Do you have any experience  with them?

They appear to be collaborative environments for teaching chess.  There is apparently a demo of Chess Tutor available at Shirov Online.  You could try writing to the authors to get more info.  No, I've never used them.

Thats just for online course by Shirov with price 150€/course. '
I found this http://www.chessdatabaseonline.com/Login/, but thats not finished now.

I'm not sure, but I know on chess.com's live site you can open an analysis board viewable to multiple members. There is a chat feature, and premium members can even voice chat. I'm not sure if there is a way to use this for what you want, however, as I don't know if multiple people can influence the same analysis board. If that is in fact possible, then there you have it.

I need something free :)

In this thread, erik says that that feature is coming soon to chess.com.  This thread suggests that it is possible on FICS.  On FICS, it sounds like you use the mexamine command to let an observer join your examine session.

Thanks that was exactly what i was looking for.

You have everything you could ever want on FICS, but it's kinda hard to use.