Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
PDFZen - The powerful, simple, free online PDF editor for the masses; free yourself from the fax machine!
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Xodo - Try easy-to-use PDF tools that keep your documents safe. Work with your important files across all platforms and devices with the ultimate all-in-one document solution. Your productivity lives at Xodo!
Clever - syncing between education applications for K-12 schools