Callback Hell analyzes your Rails application models and provides useful insights on callbacks and validations defined

Expressir ("EXPRESS in Ruby") is a Ruby parser for EXPRESS and a set of tools for accessing EXPRESS data models.

Canon provides canonicalization and pretty-printing for various serialization formats (XML, HTML, JSON, YAML), producing standardized forms suitable for comparison, testing, digital signatures, and human-readable output.

Utility for SUMA (STEP Unified Model-Based Standards Architecture)

SVG profile conformance checker for Ruby.