Wealthie

Make sure you download the correct file for your WoW version (Forever or ClassicEra).

No WoW-Retail (Midnight) or Pandabear version is planned.
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AH Assistant
See what you want to see, divide how you want to divide, made easy enough for your Ogre.

Market
Prices, goods and volume for every category, movement by tiers, item overlay.
Market data is synchronized continously/optionally. Keep it private or keep it clean, your choice.

Accountant 
Wealthie goes overkill on the data provided, stored and exported.
You can find a log of all your mails and trades here, as well.

Assets
All your assets in one market-related overview, with data on top.
Use Asset-Craft for an overview of what you can make or what you'd still need.

Trading
Keeps track of every trade.
Can account for gambling, portals, summons, reagents and consumables.

Farming
Detailed 'Bubble and AoE' stats (of dungeon runs). 
Heatmap with optional XP gain range. Useful gold/xp ratio overview.

Gathering
Routeplanner, loop value per hour. Store data of things you can't harvest, too!

Professions
Gold vs Skill gain overview.
Compose a shopping list for the AH assistant. Send your Ogre to do the shopping!

Enchanting
Gear vs material comparisons, dynamic market range. (Disenchant anyway)

Skinning
Leather values, production time, lucrative mobs, best area's. 

Fishing 
Every catch logged, per zone. Now you can remember that one specific fish!
Also tracks the value of your catch, ofcourse. And optional RMB to fish.

Pickpocket
An overview of the craft, designed to track dungeon runs. 
Every pickpocket action logged. Tracks repair costs, times caught, deaths, gear etc.

Cheese
Recipes, pets and tools - with distance, listings, profit made, times done.

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Auctioneer, Auctionator, Accountant, Gatherer and Fishing Buddy are obviously our favorite add-ons.

The vast majority of Wealthie's functionality comes from CMaNGOS classic-db.