I think FreeScout is going to be something to consider. Source: about 1 year ago

FreeScout is an open-source, self-hosted version of HelpScout that offers complete privacy and control through a PHP/MySQL application that's easy to deploy. This powerful-yet-lightweight help desk and shared inbox can serve as a nice free alternative to Zendesk/HelpScout for providing efficient customer support. Troubleshootmertr recommends it "for ticketing.". Source: about 1 year ago

I know this gets some hate for not being "pure" open source, but I'm a massive fan of FreeScout (https://freescout.net/). The core is open source, with add-ons you can purchase (one-time purchase per domain). Source: over 1 year ago

For a good open source/self hosted software project, please see https://freescout.net/. Source: over 1 year ago

I have some traction using https://freescout.net/ after Missive was getting too expensive, and it works very well.... Source: over 1 year ago

For instance, when I enter Trac-2345, logseq knows that it must be replaced by a link to the ticket number 2345 in my Trac ticket system. Source: about 1 year ago

Before there was Github, I used this software called Trac since it worked with subversion. It was so cool to be able to view source code and commits on the web. Then around 2007 or so I started using git and then in 2009 I created a Github account...so proud of Github and Rails. Thanks for the writeup! Source: about 1 year ago

If you want more functionality, such as a ticketing system and the ability to manage source code repos, look at Redmine (https://www.redmine.org/) which also has a wiki feature. Trac is older but also has a wiki (https://trac.edgewall.org/). Source: over 1 year ago

Try Trac, I've used it before without issues. Source: over 1 year ago

AFAIK Redmine is a project management software that mostly used in software development. If it is what you looking for, then check also track. Source: over 1 year ago