This is a list of FREE useful guides and resources to help beginners and intermediate players alike. For quest and item related info, you can simply use Thottbot to do your search or Wowwiki.com for World of Warcraft general info. However, the following growing list will give you a point in the right direction without the hassle of searching yourself (lazy bastards! ^_~).
This list will continue to update as people reply with their own links. Things I will not add to this list are paid guides, paid power-levelling, and gold buying links.
Scroll down the list for sectioned links.
Updated: April 11th @ 8:43pm PST
+ Great source of information: http://www.wowwiki.com
+ Guidelines to posting new Thottbot topics: http://thottbot.com/v3864599
+ Item, Weapon, Armour, Quest Help Search (Thottbot): http://www.thottbot.com
+ Armoury:[/b] http://www.wowarmory.com/
+ Character & Account Transfer Info: http://www.wowwiki.com/Paid_Character_Transfer_Service
+ Patch Download Mirrors & Info: http://www.wowwiki.com/Patches
+ Guide in getting your Mount: http://thottbot.com/v3865885
+ Level 70 Analysing Tool (thanks coz752):http://be.imba.hu
MODS, COORDINATES, MAPS, MACROS
1) Coz's list of good add-ons + coordinates: http://thottbot.com/v3840677
2) Class Macros & General Macros: http://www.wowwiki.com/Macros
3) Detailed interactive map of WoW (can find herbs, ore & treasure): http://mapwow.com
4) Chat Channels, Slash Commands (guild, emotes, etc): http://www.wowwiki.com/List_of_Slash_Commands
5) Official Interactive WoW Map: http://worldofwarcraft.com/info/flashmap/
6) Macro Coordinates (thanks Kitster_2000): http://thottbot.com/v3890979
LEVELLING, QUESTING, REPUTATION
1) Zones by level: http://www.wowwiki.com/Zones_by_level
2) Instances by level: http://www.wowwiki.com/Instances_by_level
3) James' Horde levelling Guide (thanks coz752): http://www.wow-pro.com/leveling_guides/james_horde_leveling_guide
4) James' Alliance levelling Guide (thanks coz752): http://www.wow-pro.com/leveling_guides/james_alliance_leveling_guide
5) More useful guides (thanks coz752): http://www.wow-pro.com/node/692
6) Reputation Calculator (thanks Luciferul & numberonebeaner):
- http://thottbot.com/v3796988
- http://www.wowjuju.com/index.php?page=6
7) Reputation: http://www.wowwiki.com/Reputation
HONOR, PVP, PVP REWARDS, RANKS
1) Honor system, killing racial leaders, honor point estimation, battleground objectives: http://www.worldofwarcraft.com/pvp/honorguide.html
2) Obsolete Honor Ranks (pre-TBC): http://www.worldofwarcraft.com/pvp/ranks.html
3) PvP Rewards: http://www.wowwiki.com/PvP_Rewards
4) Arena PvP System & Ranks: http://www.wowwiki.com/Arena_PvP_System
5) Battlegroups: http://worldofwarcraft.com/pvp/battlegrounds/battlegroups/
6) General PvP Info: http://www.wowwiki.com/Player_vs_Player
CLASSES, SKILLS, PROFESSIONS, TALENTS
1) Classes: http://www.wowwiki.com/Class
2) Crafter's Tome (profession recipes): http://wow.crafterstome.com/home.html
3) Gem Finder: http://www.wowgemfinder.com/cut_gems/index
4) Professions: http://www.wowwiki.com/Profession
5) Example Talent Builds: http://www.wowwiki.com/Talent_build
6) Lockpicking: http://thottbot.com/v3856295
7) Outland Plans/Recipes/Patterns' Drops (thanks coz752): http://forums.wow-europe.com/thread.html?topicId=123112936&sid=1
FACTIONS, RACES
1) Races: http://www.wowwiki.com/Race
2) Factions: http://www.wowwiki.com/Faction
ITEM/LOOT QUALITY, ITEM/LOOT INFO
1) Item Quality/Rarity: http://www.wowwiki.com/Equipment
2) Armour Sets: http://www.wowwiki.com/Armor_set
3) Weapon Finder: http://thottbot.com/?f=w
4) Armour Finder: http://thottbot.com/?f=a
WARLOCK/HUNTER PETS
1) Petopia (for hunters' pets): http://petopia.brashendeavors.net/index.shtml
2) The Warlock's Den: http://www.wowmb.net/content/Pet-Handbook.htm
GENERAL GAME INFO, MOUNTS
1) General WoW Lore articles: http://www.wowwiki.com/Lore
2) WoW Acronyms (eg: OOM, FTW, etc): http://www.wowwiki.com/Category:Acronyms
3) Mount costs and info + Paladin & Warlock mounts:
- http://www.wowwiki.com/Mounts
- http://www.wowwiki.com/Riding_trainers
4) Events Calendar: http://worldofwarcraft.com/info/events/calendar/
GUILD INFO, GUILD GUIDES
1) Starting A Guild & Info: http://www.wowwiki.com/Guilds_(Overview)
2) Guild Rankings: http://www.wowjutsu.com
3) About Raids: http://www.wowwiki.com/Raid
4) Running Guilds: http://thottbot.com/v3829681
INTERESTING & OTHER NOTABLE THOTTBOT THREADS
0) Ban Animal Tattooing*: http://thottbot.com/v3854399
1) Newbies Say The Damnest Things: http://thottbot.com/v3559115
2) Best/Worst Guild Names: http://thottbot.com/v3533788
3) WoW Limericks: http://thottbot.com/v3858541
4) WoW Improvement Ideas: http://thottbot.com/v3788163
5) Best/Worst Character Name: http://thottbot.com/v3798948
6) I AM THE PRIEST: http://thottbot.com/v3857192
7) Biggest WTF Moment: http://thottbot.com/v3847135
8) Describe your sex life in one WoW phrase: http://thottbot.com/v3569173
9) Funniest Moments: http://thottbot.com/v3843588
10) Funniest Arena Team Names: http://thottbot.com/v3867355
11) Rhythm of the Game: http://thottbot.com/v3871314
*Not WoW related, but added just for the support.