Under active development

The Apachesolr Reference module allows for the creation of Apachesolr Reference Fields (like entityreference fields).

Drupal's CSS & JS aggregation can cause database deadlock in the variable table under heavy load, this will bring your site to its knees.

This module extends the Domain Access module by allowing more centralized management of multiple domains.

Kladr is the Russian address classifier provided by the RF Federal Tax Service.
The module defines a new field type for storing addresses compatible with the kladr classification.

An API for registering a remote user provider, so that Drupal can authenticate against a remote data source.

Module to allow ease of intergration for the OpenX advertising platform.