Hashdiff is a diff lib to compute the smallest difference between two hashes.
Allows storing only incremental changes in the object_changes column
HashDiffSym is a diff lib to compute the smallest difference between two hashes.
A library for rspec that displays better hash diffs
Provides GarlandRails::Base class for ActiveRecord, which allows you to save Hashes using snapshots and diffs (in short, it's HashDiff Rails storage).