What started a short list became quite a big description, more details inside the post.
Gor tool for capturing and replaying live HTTP traffic into a test environment in order to continuously test your system with real data. It can be used to increase confidence in code deployments, configuration changes and infrastructure changes.
Gush - a parallel workflow runner using only Redis as its message broker and Sidekiq for workers.
Active Interaction - an implementation of the command pattern in Ruby. To organize and manags application-specific business logic.
iFrame Resize automatic resizing of the height and width of both same and cross domain iFrames to fit their contained content.
pgBackRest aims to be a simple, reliable backup and restore system that can seamlessly scale up to the largest databases and workloads.