Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.
Circuito.io - Instant code and wiring for your project
ISSA - Toothbrush reinvented
Goodwell Toothbrush - Open source, eco-friendly toothbrush w/a subscription plan
VoltSim - VoltSim is an interactive realtime circuit simulator. It has digital and analog components and even Integrated Circuits. It is the perfect companion to students, hobbyists, and engineers.
Solo - Personal kanban boards hosted on your own server