Senja.io - Senja is the easiest way to collect, manage and share testimonials, online reviews and feedback from your customers.
Storylane.io - Storylane helps companies build and share interactive product demos with their prospects in 10 mins. Guided experiences can be built code-less and helps convert customers faster.
Prolific Academic - Want a faster iteration between developing theory and executing studies?
Arcade - Create effortlessly beautiful demos -- in minutes.
Amazon Mechanical Turk - The online market place for work.
Demostack - The no-code product demo experience platform