The Diablo 2 Wiki
The Diablo 2 Wiki archive is available for anyone looking for information on Diablo 2. All information here is pre-D2R but contains a lot of useful information that is still relevant. Updated sections for new D2R features can be found on the PureDiablo Diablo 2 section

Category:Patch 1.09 strategy guides (Diablo II)

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Strategies designed for success in v1.09 of Diablo II. These builds will be less effective in v1.10+, due to changes in skill synergies. There were also better items added in v1.10 and later, making the v1.09 equipment choices obsolete.