Blizzard World of Warcraft against third-party plug-ins slow the development of plug-in
Alliance 1-70
Fastest Leveling Guide
100% legal. No cheats or hacks.
Updated for the latest patch.
 Horde 1-70
Fastest Leveling Guide
100% legal. No cheats or hacks.
Updated for the latest patch. Make 200g per Hour
Legally — Video Proof!
100% legal. No cheats or hacks.
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http://wow.curse.com/downloads/MostDownloaded.aspx?SectionID=3816

Name Category Hits Updated Rating Download
QuestHelper  Map & Minimap, and Quests & Leveling 46,630 10/11/2008   
Omen Threat Meter  Boss Encounters 20,304 10/13/2008   
X-Perl UnitFrames  Unit Frames, and Raid Frames 14,070 10/13/2008   
Atlasloot Enhanced  PvP, Map & Minimap, Professions, and Arena 9,733 10/9/2008   
Cartographer  Map & Minimap 7,106 10/10/2008   
Deadly Boss Mods  Boss Encounters 6,117 9/15/2008   
Auctioneer  Auction & Economy, Mail, Miscellaneous, and Tooltip 5,598 10/14/2008   
GroupCalendar  Guild, Quests & Leveling, and Boss Encounters 4,999 10/11/2008   
Recount  Combat 4,491 10/13/2008   
Atlas  Map & Minimap 4,339 9/9/2008   
Titan Panel  Action Bars 3,993 10/5/2008   
Gatherer  Map & Minimap, Herbalism, and Mining 2,946 9/18/2008   
Carbonite Quest  Chat & Communication, PvP, Map & Minimap, and Quests & Leveling 2,787 9/18/2008   
HealBot Continued  Buffs & Debuffs, Unit Frames, and Class 2,753 10/12/2008   
Preform AV Enabler  PvP 2,506 4/22/2008   
MobInfo-2 (includes MobHealth)  Unit Frames 2,234 4/19/2008   
PitBull  Unit Frames 2,061 10/14/2008   
BigWigs Bossmods  Boss Encounters, Miscellaneous, and Combat 1,866 10/12/2008   
Quartz  Combat 1,824 10/13/2008   
Proximo  Unit Frames 1,785 10/11/2008   
PallyPower  Buffs & Debuffs, and Paladin 1,688 10/14/2008   
Decursive  Buffs & Debuffs, and Combat 1,647 10/14/2008   
Titan Panel [CritLine]  PvP 1,550 8/30/2008   
Cartographer 3.0  Map & Minimap 1,549 8/18/2008   
KLHThreatMeter  Boss Encounters 1,462 9/25/2008   
Natur EnemyCastBar  PvP, Buffs & Debuffs, Boss Encounters, and Combat 1,457 7/12/2008   
Bagnon  Bags & Inventory 1,393 10/14/2008   
Bartender4  Action Bars 1,386 10/13/2008   
Outfitter  Bags & Inventory 1,385 10/13/2008   
Bartender3  Action Bars 1,294 10/2/2008   
DPSMeter  PvP, Boss Encounters, and Combat 1,251 5/24/2008   
Necrosis LdC  Class, and Warlock 1,164 10/8/2008   
OneBag  Bags & Inventory 1,118 10/11/2008   
Ackis Recipe List  Professions 1,116 10/3/2008   
ScrollingCombatText  Combat 1,094 5/14/2008   
Grid  Unit Frames 1,083 10/13/2008   
OmniCC  Combat 1,037 10/14/2008   
nUI  Buffs & Debuffs, Unit Frames, Miscellaneous, Action Bars, and Raid Frames 1,029 9/29/2008   
FuBar 3.0  Unit Frames 992 10/14/2008   
Bejeweled  Miscellaneous, and Minigames 982 9/26/2008