Got carried away a bit with the OOness of the whole thing, so while it won't be the fastest TFTP server it might be the most flexible, at least for pure-Ruby ones. With all the infastructure already in place adding a client should be a breeze, should anyone need it.

Fylla generates zsh and bash autocomplete scripts for Thor CLI applications.

DBSync

Validate and coerce user input against defined structure.

Uses Google Maps Geocoding API (V3) to geocode stuff and optionally caches the results somewhere.

Lint your Gemfile!

A CLI tool for searching Ruby gems.

Includes the free GeoLite2 City database file.

Powerful, flexible, lightweight, thread-safe interface to the Geoloqi Platform API

API Wrapper for Pocket (was Read It Later)

Bindings for Gtk+ 2 and 3, generated by GirFFI, with overrides.

The default_value_for plugin allows one to define default values for ActiveRecord models in a declarative manner

Run the same git command in a set of related repos

command-line integration with semaphoreci.com for git repositories

Provides support for using Paranoia.

Validates translated attributes accessed with globalized accessors

GUIDs for sharded models

Renders markdown via rdoc-rouge, an RDoc and Rouge bridge. Able to use fenced code blocks like github, and includes a default pygments stylesheet.

a Sinatra Application to browse the email sent by letter_opener

A simple Rack middleware for checking app health.