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

Main Websites:
Minecraft
The official Minecraft website.
Minecraft Forums
The official Minecraft community forum.
Blogs:
Notch's Twitter
The official twitter of the creator of Minecraft, Notch.
Triddin's Blog
Triddin's Tumblr Blog.
Moujave's Blog
Moujave's Tumblr Blog.
The Word of Notch
The official blog of the creator of Minecraft, Notch.
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.
Galleries:
Minecraft Gallery
Displaying the best creations in Minecraft.
Hosting:
WoM Realms
Control your own realm! Free + upgrades available.
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 WoM Direct.
Wikis:
Minepedia (minecraftwiki.net)
The Official Minecraft Wiki.