Ruby is already pretty lispy let's take it the rest of the way.

Union, Intersect, and Difference set operations for ActiveRecord (also, SQL's UnionAll).

A simple query interface for pulling deeply nested data from records.

Objects are functions! Treat any Object or Class as a Proc (like Enumerable but for Procs).

A Ruby object that represents a given time-of-day separate from any Date information. Makes it easy to perform work time calculations.

Relational programming for Ruby

Generate data from contracts

Generative or property based testing for Ruby

An nREPL server & client for Ruby

Contracts for String Coercion (see https://github.com/egonSchiele/contracts.ruby)

A programable system for data collection and analysis.

An an experiment in simplicity for web development

A simple time tracking application

A tool for generating sheets of QR codes with an optional message.

An implementation of multiple dispatch for Ruby. Also known as generic-functions or multi-methods.

Thread-safe immutable objects that provide delegation and basic validation to hashes.