Vote for Quota Server

Quota Server, an SRM solution, has features like Explorer Interface, API, MMC Snap-in, Active Directory support, Web Interface and Remote Control from your Mobile phone or PDA.

Through its interface [and via integration with Windows Explorer], Quota Server gives systems administrators the ability to set quotas on space to be allocated to a drive, directory, file and/or an individual. In addition, administrators can apply file blocking quotas. When a quota is exceeded, an alert prompts the software for a specified response, which automatically prevents a user from exceeding their quota. Clustering support allows administrators to set and monitor user-based quotas, creating a coherent storage management framework in clustered environments. The range of reporting options provides views of all processes.