Can we use this post and maybe discuss possible alternatives to JIRA?
It's like Google Docs + Trello + a Wiki. We use it for our product roadmap and task management, and can easily link to documentation, specs, or discussion all in one platform. I'm a huge fan.
It's pretty extensible and I find it easier to use than Jira.
My complaints aren't necessarily against Jira the software, but the way it got setup at my org. It seemed more for stat building for the PMs to show during their annual review.
However, I've used Jira previously and it worked just fine for me and the team. YMMV
Trello is good for what it's designed for - simple lists of lists of notes.