The MMOUI Minion could help the ones having trouble with Curse Client past version 4.X (when wine support broke).
It is still a beta provided by ZAM network, the company behind http://www.wowinterface.com/ among other sites.
For the few Add-Ons it doesn't cover you can still update manually as the minion probes new addons in your folder and try matching online (just like curse client do, byt on wowinterface database instead).
For more details and user comments, view the versions of this application
|Version||Description||Latest Rating||Latest Wine version tested||Test results||Comments|
|2.0.13-beta||Beta version of the second minion version, revritten from ground up compared to earlier minion. (as i did not try that one i can not subscribe to wether this one is better in any way, how ever it semes to me it is the perfect replacement to curse client 4.x+ when loading the game in wine on top of Linux, how ever not using curse database but wowinterface database)||Silver||1.7.28||1||0|
|2.0.15-beta||The latest version of the beta add-on manager for World of Warcraft from the ZAM Network. Includes new Backup AddOn setting, global settings window, and various other improvements and bugfixes detailed in the changelog here.||Bronze||1.7.34||1||0|