Equivalence.com is very extensive website featuring 4 different 'chapters':

1. Entrée (featuring 'bitbox' on photography blogs)
2. Pavillon, devoted to European Photography Magazine and the very useful European Photography Guide
3. Laboratory, about the two founding fathers of Equivalence.
4. Relais, with a lot of useful links. Keeps you up to date and offers further reading.

One of the founding fathers of the website is Andreas Müller-Pohle, who is the driving force behind other initiatives like European Photography Magazine and a series of workshops called Eye-Mind.