Open Source #calendar Projects

Self-hosted subscription tracker with timezone-aware reminders, budgets, spending insights, and ten notification channels.

Self-hosted, offline-first productivity app combining tasks, habits, a Pomodoro focus timer, and calendar with optional WebDAV sync.

Self-hosted, open-source task manager with lists, kanban boards, Gantt charts, reminders, and CalDAV — a free alternative to Todoist.