If you can't use Hudson :(

Civility is the easiest way to manage your Civ5 hotseat games hosted on Giant Multiplayer Robot

CKAN CLI with built-in CSV file validation and CKAN API integration.

CKEditor is a javascript library of the WYSIWYG rich-text editor. This gem integrates CKEditor with Rails asset pipeline for easy of use.

CKM client via web services and command line tool

A collection of command line tools, especially for popular API services.

Your personal AI for the terminal

Clamshell allows you to setup shell statements which configure your project's environment that doesn't care about which shell (bash, tcsh) the target user will be using.

A Ruby dialect that includes types in the language. Transpiles to Ruby and RBS by leveraging the ruby-next and irbs gems. Type checks with steep.

Classic API Client to communicate with Classic Server

File Encryption Manager

Cleaner is a small tool which helps you keep your directories clean. With simple DSL you define set of rules, which are then periodically executed against specified directory.

Clearcase has no simple to use command line tool - to find and add view only files in a recursive manner - to checkout and checkin hijacked files. This tool is a simple wrapper to cleartool which allows just that. Usage: $ cch help

clenver aims to shorten time of configuring your brand new *NIX account to fully featured development envionment of your choice

The gem provides text nodes markup, text repository, advanced customizable CLI for managing repository, the powerful templating system for text transformation that perfect matches for managing large structured texts.

Small set of Ruby classes helpful for creation of CLI tools.

Make it easy to deal with online programming contests from the command line

CLI for Redmine

Build a command line interface over HTTP

Clipcellar is a full-text searchable data store for clipboard by GTK+ (via Ruby/GTK2) and Groonga (via Rroonga).