Gantter

Gantter runs as a web app and Google Workspace add-on, letting you build Gantt timelines that sync with Google Drive files and Google Calendar. You can create milestones, assign resources, and track dependencies using familiar Google tools.

Project managers embedded in Google Workspace environments use Gantter to avoid context-switching into a separate PM tool. It's particularly useful for cross-functional teams that already live in Docs and coordinate through Calendar.