toolani - Cheap international calls
Viable Fit - Measure and improve your product market fit
KeepCalling - Best Rates for International Calls. No Contract, Expiry, or PIN. Use Any Phone, Smartphone or PC.
OpinionX - Stack rank people's priorities in minutes with OpinionX's free ranking surveys.
Rebel Calling - Internet-free international calling for $1 a month
Product Fit - Measure product/market fit in app with your users.