1 To move you buff/debuffs around try
Satrina Buff Frame
2 You dont need an addon to resize you chat window, all you have to do is right-click on tab above the window and press unlock.
Then to move it grab the tab and pull it to where you want. To resize it grab an edge and pull untill it is the size you want
3 Lots of addons do this, I use
Perl Classic Unit Frames, but if its not for you there are plenty of other
Unit Mods