WoW Heroes is a useful site that pulls a lot of quirky functionality into one location. It is not a cover-all site, but can be great for comparison purposes.
A quick search will bring up your character, complete with gems, enchants, your raid progression, achievements, etc. If your gems and chants are suboptimal, the site will recommend better ones for you.
One tab over you’ll find the “Compare” tool, which lets you view your character side by side with another. This is great to check out guildies who might need help, compare yourself to well-known or accomplished players in your class, or just for bragging rights.
The guild tab can let you view gear scores for an entire guild (a la GearScore add-ons), and browse the guild for professions. And the Realm tab can be used in much the same way as sites like WoW Progress (featured quite a while ago here in a resource article). It tracks your boss kills and achievements, and ranks guilds within a given realm. I found my own guild’s progress to be missing achievements from the last couple weeks, but it was otherwise up-to-date on my character and guild.
Other features such as a hit calculator and forums are also handy tools. The result is that WoW Heroes is an excellent site to compare yourself and your guild to a host of others, which can be informative or just fun.
The resource site spotlight is a “weekly” blog written by Arthemystia from warcrafthuntersunion.com, in his quest to find every useful WoW website on the internet.