Here you can find many Minecraft websites from communities, to blogs, and more.

Websites:
Minecraft
The official Minecraft website.
Minecraft Sites
Complete Minecraft Websites List.
Communities:
CraftHub
A Minecraft help website and community.
Minecraft Exchange
A Minecraft contest site and community.
Minecraft Workbench
A Minecraft tools website and community.
Mikes-Revenge
A minecraft community of friends, gamers and digital artists.
Hosting:
Enjin Hosting
Host your own Minecraft community.
Skins:
Skin Gallery
A site to share and vote for Minecraft skins.
Minecraft Skins
A skin download site with auto-add feature.
Software:
MCForge
Free custom server software - Supports World of Minecraft Direct.
Galleries:
Minecraft Gallery
Displaying the best creations in Minecraft.