It's funny, people are saying that 2.0 busted so many mods for warcraft. What it did for me was discover what "new" mods were out there compatiable for 2.0.
I currently use:
Titan Bar - Titan XP - Recommend ZoneTitan is a nice quick glance, at how much gold I have, what coordinates I'm at, how much time I have until I level based on current XP intake, my DPS meter is clickable on the bar, and I keep this bar fairly simple. Just the info I need. The Recommend Zone is one of my favorites during leveling. There are just some times you run out of things to do in a zone, and don't know where else to go. I look at that and see what instances I can run, what zones I can go to. It's really nice.
CosmosYup, I'm a cosmos user. I use Arcane bar, I disable the main casting bar at the bottom of the screen. I use bag space, to let me know how many slots I have left...very nice simple mod. Party quests, quest level, equip compare, and other small mods that I always forget but miss when we have a major patch. /sigh
AuctioneerI'm currently using the Alpha version of this mod. I don't recommend it for those are not mod savvy. However, the newest version does seem fairly stable. Nice for knowing how to sell on the AH, and what not to buy. It also comes with Enchantrix...very nice for an enchanter, Kir's one. However, I picked up a nice enchanter mod that minimizes my need for this one.
CTmodWow, this is a big one. I've always used CTRaid up until recently, now I'm using the big guy. Don't really care for the bar part. I've been playing for 2 years using the current bars, that messing with them isn't really my need. I'm happy with them, so why miss em more whenever we go through a major patch. I DO love CTbuff mod. This is a new way of looking at your buff, curses, diseases, etc...timer. It lists them down in decending order. It's actually rather nice once you get used to it. I've customized it's looks a little, and shrunk it down some...dont' need it to take over my entire screen. CTCore currently doesn't seem to like Arcane bars, but only errors on the first use.
HealbotNew mod for me now that I'm actively playing my priest. It's really nice. It doesn't autotarget, however it allows you to customize difference functions i.e. decursing, disease removal, different types of healing spells to your mouse buttons. In addition, it utilizes cntl & alt buttons. It's fairly customizable, including the bar colors, and types of notifications i.e. raid, party, self...etc.
Other Small Mods I UseFishing Buddy - Fishing is a pain at first, but this mod keeps track of everything you've fished on all your toons. That way if you are looking for something specific, i.e. stonescale eels.
Fizzwidget Disenchant Predictor - the reason why I lke this mod is, pretty simple, if I'm looking for a particular essence, it tells me the level range of the item I need to go find. It also tells me that it's likely, unlikely, and rare to disenchant into....
GEM - Guild Event Manager. BTDOTM uses this to schedule event. Good for those that get it, bad for those that can't. It works pretty well over all though. It really helps a raid leader in inviting and seeing if the raid is full, and with what classes.
I'm sure I forgot some items. Oh, and for all these mods, I've increased my memory to about 75 from 48. I don't have any problems running these, but I do have 2 g of Ram. /yummy