/Tab - The simple way to split a bill among friends.
DIY Air Purifier - Build your own air purifier for under $100
PayPal.Me - Request money using your own personalized URL.
Traverse - Barcoding solution for small to midsize businesses
Diggsweep - Easily create your own 'garage sale' to share with others
Epihub - Shopify for tutoring, training, and online schools