slack-rtmapi2 is dumb: no EventMachine, no Celluloid, no Actor design pattern, no thread pool (thought, any of those would be trivial to add). It's a simple loop on top of a SSL socket with a websocket decoder. Minimal dependency. Works out of the box. Hackable. Composable. Oh, by the way, it implements very well the Slack API.

slack-rtm-bot-helper supports development slack bot using rtm.

A Ruby interface to Slack API

Easy way to build a whitelist authorization mechanism for slack ruby bot commands. Define roles and add slack users and slack commands to those roles. When the bot receives the command, the framework verifies that the given user has permission to execute the command. If denied, a custom handler can be setup to run instead.

Slack bot boilerplate for response on different events.

Packages a Dangerfile to be used with Danger for projects within the slack-ruby community.

Slack progress bars for Ruby.

Importing slack log from exported files or API to elasticsearch or other datastores

Command line tool to get the status of current users

Parse test results from various sources and post reports to Slack

Helper methods to effectively use Slack & Trello with your team's Scrum processes.

A gem to help post to slack using webhook

Eegosearching twitter and post to slack.

Make it easy to invite users to your Slack community team

A Ruby wrapper for the Slack Web API

Gem send messages to slack web hooks depend upon the type of the message.

An abstraction of the json structure needed to create widgets in Slack message attachments

Want to send the emails generated by your Ruby on Rails application to a Slack channel? Now you can!

Slaghund OCTGN stats scraper

Symbol-LAMbda hacks