Gantt - Create beautiful Gantt charts
GoodGantt - The best Gantt chart for Trello®
Elegantt for Trello - The most elegant way to manage your Trello projects
OnePager Pro for Microsoft Project - OnePager Pro builds Gantt charts, timelines and multi-project reports using data from Microsoft Project, Project Online, and Project Server.
Gantt Charts for Zenkit - Track & manage complex projects with a Gantt chart in Zenkit
Teamgantt - Intuitive project planning and collaboration. Beautiful Gantt charts, task-level communication, file sharing, resource management and more.