Perhaps you've been able to reach them by other means, at least the official GW Wiki, but I'll post them here anyway for quick reference:

1. The Official GW Wiki: http://wiki.guildwars.com/wiki/Main_Page
2. The Guild Wiki, on Wikia: http://guildwars.wikia.com/wiki/Main_Page
3. The PvX Wiki: http://www.pvxwiki.com/wiki/Main_Page (this one is a reference for character builds)

The Official GW Wiki helped me complete several trickier missions and also makes a great tool for someone who's exploring the world for the first time.