I coded this UI from scratch for myself while raiding and thought that I would share it since I am rather fond of it. It is still in the early stages of development so it works fully in raid but there are some querks that you will notice from time to time (please let me know about any bugs and I will fix them as fast as I can).
What I have done and the reasons for it:
The main thing that sets this apart from others is that the raid frames will change size to fit the bosx they are designed for. I wanted this because I like to keep my rather tightly together to avoid unneeded eye movement as I play on a large monitor.
This addon is mainly in charge of unit and raid frames but it also moves around other aspects and hides most of the ui features other than the action bars which is why I put it in the suites section.
This addon was developed to meet my specification so therefore there is no options menu in it. There is however an config.lua that you can change if you want to, it has however ended up rather large and complicated so if you know nothing of lua it may be to much.
There are no tool tips on the frames and right click is only enabled on player and target. This is intentional as I believe that in other places they just get in the way of raiding. I will not be putting these in in the future.
If you find any bugs then check the known bugs section below and if it is not there then please let me know in the comments to this addon.
Updates:
1.1.0:
Massive changes to raid frames.
Large under the hood changes.
Added an action bar overhaul (if you don't like you can turn it off by removing the action bar lua from the toc
2.0.0:
Large graphical improvements including new textures and a new main font.
Added an info bar in the bottom right.
Added arena frames, you will need to disable the normal ones in your interface options.
2.1.0:
Kinda fixed for 6.0 but still some little bugs.
Known Bugs:
The focus options on the drop down menus is blocked (I know there is a fix for this but no idea where to look)
Names with unusual symbols and russian names sometimes appear as ... rather than names on the raid frames.
Planned Improvements:
Add options for action bar spacing and making the bars shorter.