Elegantt for Trello - The most elegant way to manage your Trello projects
GoodGantt - The best Gantt chart for Trello®
Agile Tools for Trello - The one power-up all agile teams using Trello need
Gantt - Create beautiful Gantt charts
Gantt Charts for Zenkit - Track & manage complex projects with a Gantt chart in Zenkit
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.