Add Octobox (#1046)

* Add Octobox

* Added fullstop

* Added network warning

* Put ⚠ in backticks

README.md

@@ -994,6 +994,7 @@ See also [Ticketing](#ticketing), [Task management/To-do lists](#task-management
   * [Kallithea](https://kallithea-scm.org/) - Source code management system that supports two leading version control systems, Mercurial and Git, with a web interface. ([Source Code](https://kallithea-scm.org/repos/kallithea)) `GPLv3` `Python`
   * [Klaus](https://github.com/jonashaag/klaus/) - A simple, easy-to-set-up Git web viewer that Just Works. ([Demo](http://klausdemo.lophus.org/)) `ISC` `Python`
   * [Lavagna](http://lavagna.io) - Lavagna is an open-source issue/project management tool designed for small teams. Lightweight, pure Java, easy to install, easy to use. ([Source Code](https://github.com/digitalfondue/lavagna)) `GPLv3` `Java`
+  * [Octobox](https://octobox.io/) `⚠` - Take back control of your GitHub Notifications. ([Source Code](https://github.com/octobox/octobox)) `AGPLv3` `Ruby`
   * [OpenProject](https://www.openproject.org) - OpenProject is a web-based project management system. `GPLv3` `Ruby`
   * [Phabricator](http://phabricator.org/) - Collection of web applications that help build better software. ([Demo](https://secure.phabricator.com/), [Source Code](https://github.com/phacility/phabricator)) `Apache` `PHP`
   * [Redmine](http://www.redmine.org/) - Redmine is a flexible project management web application. ([Demo](http://demo.redmine.org/), [Source Code](https://svn.redmine.org/redmine/)) `GPLv2` `Ruby`