Product Fit - Measure product/market fit in app with your users.
productboard - Beautiful and powerful product management.
Viable Fit - Measure and improve your product market fit
FastNetMon - FastNetMon is a very fast DDoS analyzer with sflow/netflow/mirror support.
OpinionX - Stack rank people's priorities in minutes with OpinionX's free ranking surveys.
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.