@la0wei Django: Web framework written in Python, used to serve all pages. Celery & RabbitMQ: Asynchronous queueing server, used to fetch and parse RSS feeds. MongoDB, Pymongo, & Mongoengine: Non-relational database, used to store stories, read stories, feed/page fetch histories, and proxied sites. PostgreSQL: Relational database, used to store feeds, subscriptions, and user accounts.