http://www.curse-gaming.com/en/wow/a...s-lfg-mod.html
CallToArms (CTA) has three main features:
1. Find players and groups
This feature shows the user a list of all players who are looking to join a group and groups who are currently looking for more players. This is a global list that shows players and groups from all over Azeroth.
2. Flag yourself as LFG
Using this feature, the player enters a short description of the desired quest/instance etc. that s/he would like to do. This information is placed on the same list that is viewable by all other users globally.
3. Find more players for your group
CTA lets group leaders create a profile of their group. This profile includes a short description, the maximum size of the group and the level range of the group members. Group leaders can even set the class distribution of the group members. This finformation is posted on the global list so that other users can view it.
CTA also has a blacklist feature which is a list of players that are not allowed to join your group. The blacklist also acts as an extended ignore list.
For more information consult the README file in the CallToArms folder after installation or see an online version of it at
http://hub1.netfirms.com/wowui/cta/cta_readme.html 
