Vikunja

Vikunja sits between a personal to-do app and a light project management tool, and it has been in active, continuous development since its first commit in June 2018 — eight years of steady releases, including regular security patches, which is longer than most tools in this category have existed at all. The same task data can be viewed as a simple list, a kanban board, a spreadsheet-style table, or a Gantt-style timeline, so a solo user tracking personal errands and a five-person team running a sprint can use the same install without feeling over- or under-served.

Self-hosting is genuinely light: Vikunja ships as a single Go binary that can run against SQLite for small installs, with Postgres/MySQL available when you need to scale. Recurring tasks, reminders, saved filters, and a REST API with OAuth2 provider support round out the feature set, and native iOS, Android, and desktop apps mean it isn't a web-only tool.

The trade-offs are proportionate to its scope. The core is AGPL-3.0 licensed, which matters if you ever wanted to resell a modified, network-hosted version — you'd be required to publish your changes. Its integration ecosystem is much smaller than Asana's or even Plane's, since it has never chased enterprise integrations. And while the Gantt and advanced-filter features work, they read more like a well-built to-do app that grew upward than a tool designed from day one for sprint planning. For a single lightweight install spanning personal tasks through small-team projects, Vikunja is hard to beat on simplicity and hosting cost.