Ziflow - Online Proofing software from Ziflow keeps teams connected and collaborating by providing a single source of truth for creative review and approval.

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.

PageProof - Online proofing of anything and everything, made simple. Streamline feedback for easy collaboration, secure workflows, and faster approvals. PageProof. The smarter way to review.

Clever - syncing between education applications for K-12 schools

Approval Studio - approval workflow tracking, artwork approval, asset review, design review, design review feedback, design revisions image annotations, onlineb proofing, pdf annotation,preview images, project managment

Claroline - Claroline is a collaborative eLearning and eWorking platform.