Added Leantime.io

README.md

@@ -1276,6 +1276,7 @@ _See also [Ticketing](#ticketing), [Task management/To-do lists](#task-managemen
 - [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)) `GPL-3.0` `Python`
 - [Klaus](https://github.com/jonashaag/klaus) - Simple, easy-to-set-up Git web viewer that Just Works. `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)) `GPL-3.0` `Java`
+- [Leantime](https://leantime.io) - Leantime is a lean project management system for small teams and startups helping to manage projects from ideation through delivery. ([Source Code](https://github.com/leantime/leantime)) `GPL-2.0` `PHP`
 - [Octobox](https://octobox.io/) `⚠` - Take back control of your GitHub Notifications. ([Source Code](https://github.com/octobox/octobox)) `AGPL-3.0` `Ruby`
 - [OpenProject](https://www.openproject.org) - OpenProject is a web-based project management system. ([Source Code](https://github.com/opf/openproject)) `GPL-3.0` `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-2.0` `PHP`