Discussion on:

Five ticketing systems for developers

SourceGear Vault has bug tracking along with their source code control in their Vault Professional product. They also integrate with FogCreek FogBugz and Axosoft Ontime.

I see that the Win Builder site is the only clue we have to writing an OS.

Assembla.com

Very eclectic mix, not sure why TestTrack Pro would not be listed as well , being one of the market leading tools.

Using YouTrack, and I really like it. Especially since it integrates well with Team City, which I am also using. Yes, I'm a fan of JetBrains software, in general. Can't even remember how to use Visual Studio anymore without ReSharper.

I was using Trac but I have started using Redmine. I really don't need all the bells and whistles of Trac. I find it to be a better all in one project management solution for development.

I'm using REDMINE. It has everything I need since bug tracking to project management

Redmine actually does everything that each of these solutions does: solid ticketing system, mature open-source code base, svn, wiki, and additional project management tools.

Also a Redmine fan; works well, reliable, can edit a main ticket body after initial insertion, nice wiki formatting in tickets, Mercurial integration, not overly complicated but lets you get good oversight over complicated processes.

Yes, I am a Redmite fan too. It is easily configurable, FLOSS, supports multiple projects, very flexible - you can configure workflow and access control scheme to your liking, and it has several mobile apps for iOS and Android. There is also an extension for agile/scrum suport, which looks rather mature (I have not tried it yet though), and a mobile theme (have not tried it yet too).

Redmine is awesome and has a rich set of plugins. It's extensible and has lots of great integration and workflow features. I love the simple wiki, and the fact that it does mercurial really well. There are some very nice agile plugins for it too.

On the down side you have to test the plugins you want before deploying them. Some don't work as expected and some have huge performance problems. It's really difficult to install on Redhat lineage systems like CentOS if you choose to do it yourself. On debian variants you can install it with aptitude or synaptic and then a little bit of apache configuration and some rails config tweaks to get it rolling.

Out of the box it's great.

It's based on WordPress http://mktsd.com/faultpress

You forgot to mention this. Have used Trac before & currently MantisBT. OTRS is highly configurable, stable/reliable, etc. We are using it from Helpdesk to bugtracker to approvals (just to name a few). It's a very good OSS.

And I forgot to mention that it has one of the best ITSM features.