iBE.net - Your Business in the Cloud
productboard - Beautiful and powerful product management.
Workzone - Workzone is a web-based project management software.
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
Xebrio - A Project Management Software to Fulfill Your Story From Requirements to Deployment.
ProductPlan - Cloud-based product roadmap software solution