Add GlitchTip to ticketing (#2690)

README.md

@@ -1669,6 +1669,7 @@ _Related: [Task management & To-do lists](#task-management--to-do-lists), [Softw
 - [Erxes](https://erxes.io/install/) - Marketing, sales, and customer service platform designed to help businesses attract more engaged customers. ([Demo](https://demo.erxes.io/), [Source Code](https://github.com/erxes/erxes)) `GPL-3.0` `Javascript`
 - [Flyspray](https://www.flyspray.org/) - Uncomplicated, web-based bug tracking system. ([Source Code](https://github.com/Flyspray/flyspray)) `GPL-2.0` `PHP`
 - [FreeScout](https://github.com/freescout-helpdesk/freescout) - Open source clone of Help Scout: email-based customer support application, help desk and shared mailbox. `AGPL-3.0` `PHP`
+- [GlitchTip](https://glitchtip.com) - Open source error-tracking app. GlitchTip collects errors reported by your app. ([Source Code](https://gitlab.com/glitchtip/glitchtip)) `MIT` `Python`
 - [Helpy](https://helpy.io) - Helpy is a modern, open source helpdesk customer support application. Features include knowledgebase, community discussions and support tickets integrated with email. ([Demo](https://demo.helpy.io), [Source Code](https://github.com/helpyio/helpy)) `MIT` `Ruby`
 - [HuBoard](https://github.com/huboard/huboard) `⚠` - Instant project management for your GitHub issues (Connects directly GitHub API). `MIT` `Ruby`
 - [MantisBT](https://www.mantisbt.org/) - Self hosted bug tracker, fits best for software development. ([Demo](https://www.mantisbt.org/bugs/my_view_page.php), [Source Code](https://github.com/mantisbt/mantisbt)) `GPL-2.0` `PHP`