Project Management and ERP software

[noisyturtle]

Been trying to expose myself to learning PM and ERP software in training for producer's positions and was looking for any input as to people's preferred sources. I've used OpenProj quite extensively on projects, and have recently been turning to Redmine as I think the layout and versatility is better once you learn it. Also have used Assembla to a lesser extent, but I hate it. Does anyone have any other suggestions or thoughts on better resources, or have experience with some other software for medium to large sized teams? Specifically Atlassian?

[Parak]

For actual project management, I've only used liquidplanner - eh, it's okay, I guess. For a somewhat complete ERP software to manage various business aspects, I kinda like the simplicity by erpnext compared to others I've evaluated.