pg-amqp-bridge vs Sparrow: What are the differences?

pg-amqp-bridge: Send Messages from PostgreSQL to RabbitMQ. This tool enables a decoupled architecture, think sending emails when a user signs up. Instead of having explicit code in your signup function that does the work (and slows down your response), you just have to worry about inserting the row into the database; Sparrow: A really fast lightweight queue written in Ruby that speaks memcache. Sparrow keeps messages in memory, but persists them to disk, using Sqlite, when the queue is shutdown.

pg-amqp-bridge and Sparrow can be primarily classified as "Message Queue" tools.

pg-amqp-bridge is an open source tool with 251 GitHub stars and 14 GitHub forks. Here's a link to pg-amqp-bridge's open source repository on GitHub.