Official Website: https://www.pathofexile.com/
Patch Notes: https://www.pathofexile.com/forum/view-forum/patch-notes
Ladder Rankings: http://poestatistics.com/
Shop Index: http://poe.xyz.is/
Shop Index: http://poexplorer.com/
Trade Chat Web-Interface: http://poetradechat.com/
Skill Tree Calculator: https://code.google.com/p/path-of-exile-skilltree-planer/