Online Resources for the Corinthian Epistles

Michael Kok provides his list here. To these I would add the following.

Background and Archaeology:

• Corinthian Matters for background materials 
• BiblePlaces for annotated photos for Corinth here and and the Corinth area here

Commentaries

• Bob Utley on 1 and 2 Corinthians here
• Thomas Constable for 1 Corinthians here and 2 Corinthians here
• Precept Austin has a number of links for 1 Corinthians here and for 2 Corinthians here