It's what I would call my UI. Messy organization. It works for me, but some people might find it difficult to understand.
I've labeled most of the items on there, but will break it down, from the left hand side of the screen to the right.
My unit frames, I left alone. The text on the unit frames -- percentages and numbers, are from CTUnit_Frames.
My chat, too has been left alone.
Over a bit is Decursive; my raid frames fill up to the edge of DoTimer and then group five below, and next to group five is the pet bar. Next to the pet status bars is Decursive. DoTimer are my cooldown timers of choice, although I tend to look more at my action bars than it.
My action bars are formatted with Dominos; I took a few bars and put them on top of each other for more convenience and more room for my chat window. I both click and use my number keys -- the important stuff I'll hit a lot are 1-5. Everything else not as important but I should have on my bars anyway are spread around. My vertical sidebars are for mounts, toys, Kitty, Bear, and Healy are for weapon and idol change-outs, and the two idol pictures near those are cat idols for the different occasions -- trash, boss. Macro for Vent, my professions, and the buttons I don't need very often but still need -- hearth, portal to Moonglade, Gift of the Wild.
My tell window is supported by Windows IM -- yes, that's my Aussie in the party, and you can see some of our chat history -- not intentional, mind you, but hey. Individual tells put off to the side so even if my screen is scrolling really fast because there is raid chatter and loot windows and people hopping in and out of channels, I won't lose my tells.
My Mini-Map is an utter mess, but I've tried to label it to the best of my ability -- Altholic [favorite add-on ever -- it tracks everything about your characters. From professions and being link to them from any character to what's in a character's bags and back to their achievements to /played on every character [and it combined too] to all the money you have on your characters. It's also got a search feature, so if someone asks you if you have [insert item here], you can look it up and tell them without alting loads. It's a must have for any altholic, which I can say I am...
Atlasloot -- a list of most of the loot in the game.
ItemRack -- I prefer this over Outfitter. An outfit changing addon, for quick set swaps. Another must have for any character with more than one set of gear, especially hybrids!
CTMod -- for my buffs and my unit frame text. Manages my mail a bit as well, but main purpose for me is the buffs and text. Built in is a expense history, which is kind of nifty to see how one's expenses break down.
SRaidFrames -- I like the look of CTRA, a mod I had since my days of subbing in Molten Core. It was in BC that I finally replaced it with an addon that will tell me if someone's within range or out of range by fading it out, so I wouldn't be forever trying to heal someone too far away. That's when SRaidFrames came in. I still had the look of CTRA, but it had the functionality I needed.
My Omen window itself is normally placed right next to my CTBuff_Mods. My threat meter of choice.
DBM -- Deadly Boss Mods. For timers and everything useful for raids.
Cartographer: Map manipulation, so it's smaller, has an opacity, and I can navigate even while having it up, as well as notes and fog light for those unexplored areas but you still want to see where they are.
Those are the main important ones, I think.
Hopefully, it gave you a sense of the view port out which I look every time I log in!