SecuraCart - The easiest way to accept one-time and recurring payments.
Epihub - Shopify for tutoring, training, and online schools
Atom Pay - Atom is the easiest way to get paid for what you do.
Traverse - Barcoding solution for small to midsize businesses
Payzo - Accept credit cards with zero coding (for freelancers)
DIY Air Purifier - Build your own air purifier for under $100