Annotate.co
Annotate.co

Annotate.co

Annotate.co: an online annotation tool that allows you to collaborate with invited users in designated roles. Converts your documents and images to PDFs, stores them in workspaces, and lets you share single documents or entire workspaces. Add tags to documents, hold discussions, vote on annotations, and compare revisions. FREE (for sharing with up to 3 users)/Premium (Standard/Enterprise)