On the Mac, Merlin Project [1] and OmniPlan [2] might be worth a look. They've both been around a long time and seems to be the MS Project equivalent for Mac. Not having a PC version is a pain though.

On the web, Harvest Forecast [3] looked tempting, but I haven't dived into using it. I love Harvest for my solo time accounting though.

For solo projects, I really like Mr Schedule [4] and its keyboard driven outliner type interface (inspired by Joel Spolsky's Painless Software Schedules). It doesn't do resource management, so is unlikely to be helpful to you (but maybe to someone else here). Sadly it seems abandoned & requires Java, so I've been making my own cross-platform clone of it (just for my own use for now).

I tried ProjectLibre and it just felt horribly, horribly broken.

I wish someone would make a decent Android tablet app for project management, bonus points if it supported the Samsung Galaxy S-Pen for reordering tasks etc. I tried several Android apps & didn't find anything I liked.

[1] http://projectwizards.net/en/products/merlin-project/what-is

[2] https://www.omnigroup.com/omniplan

[3] https://www.getharvest.com/forecast

[4] http://pietschy.com/products/mr-schedule/screenshots.html