Postmill — the free, social, web-based link aggregator
Postmill is a free, social, web-based link aggregator and discussion forum software with nested comments and voting. Originally developed to serve the needs of one particular online community, it is now developed independently, and aims to serve a wider variety of needs.
Lightweight. A typical request will incur less than 4 MB of memory usage, not including the memory consumed by the database server. You can host Postmill on a $5 virtual private server.
Robust. Postmill is built on proven technologies such as the Symfony framework, Doctrine ORM, and PostgreSQL, and takes advantage of the facilities provided by these in order to avoid reimplementing the wheel.
Clean. We're confident you'll find Postmill's source code to be more structured and well-formed than your average off-the-shelf discussion board software.
Free and open source, and always will be. There will never be a premium version. Contributors will never be asked to waive the rights to their contributions.