[Grue3]

I prefer JIRA. I used Github issues and my current place of work uses Redmine, and neither of them are as nice to use. I like the ability to customize your dashboard to show the exact issues you're interested in, and that you can filter them by basically everything.

[eropple]

I like Jira when I have to use something that beefy, but I'll cape up for Redmine a little bit. I find it to be super easy to hack on when I need to extend it to do what I want and it's a pretty pleasant experience.