Open Source Gantt Chart

A Gantt chart's value is also its trap: once you've wired up dozens of tasks with dependencies, durations, and a critical path, that schedule becomes a model you have to keep recalculating every time reality slips - and a plan you can't reopen or move is a plan you have to rebuild from scratch. The open source tools here keep that whole dependency graph in readable files on your own machine, so the schedule you spent days constructing stays yours to reschedule, script, or revisit years later.