Popular: Data updated October 27, 2026

Categories

Internet1,356
Communication321
Audio & video898
Graphics & design539
Office & productivity1,124
Developer tools3,134
AI tools529
Security & privacy385
System tools3,114
Games523
Education & science239
Network & IT284

Killendar alternatives

Encrypted calendar for Windows. Install or run portable. GPLv3. No account, no sync, no telemetry.

Steve the Killer Project management #27 Project management

12 Windows apps in the same category as Killendar, ranked by what they have in common and by popularity.

  • GanttProject

    Free desktop project management software

    Open source 3.3.3316 73.4K ↓ ★ 1.1K
  • XrmToolBox

    XrmToolBox is a Windows application that connects to the Common Data Service for Apps (CDS).

    Open source 1.2026.9.78 7.5K ↓ ★ 653
  • Todoist

    Become focused, organized, and calm with Todoist. The world’s #1 task manager and to-do list app.

    Proprietary 9.33.1 13.9K ↓ calendar
  • t-clock

    Highly configurable Windows taskbar clock

    Other licence 2.4.4 5.9K ↓ calendar, portable
  • Cal

    Scheduling infrastructure for everyone.

    Open source 1.10.1 ★ 49.2K calendar
  • DooTask

    Lightweight task management tool

    Open source 1.10.12 ★ 5.6K calendar
  • Miro

    The innovation workspace where teams manage projects, design products, and build the future together.

    Proprietary 0.11.196 3.7K ↓
  • Focalboard

    Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana.

    Open source 7.11.3 ★ 26.5K
  • Sunsama

    The digital daily planner that helps you feel calm and stay focused.

    Proprietary 3.4.15 157 ↓ calendar
  • Japplis Watch

    Time related tools like clock, timer, stopwatch, alarm, time zones and more.

    Free 1.1 549 ↓ calendar
  • Pomodoro Logger

    Pomodoro Logger -- When a time logger meets Pomodoro and Kanban board

    Open source 0.6.3 ★ 1.2K desktop-app
  • grocy-desktop

    ERP beyond the fridge

    Open source 2.15.0 ★ 389 csharp

Comparison

AppLicenceVersionUpdatedGitHub starsChocolatey downloads
Killendar Open source 1.4.0 October 22, 2026 10 94
GanttProject Open source 3.3.3316 April 14, 2025 1.1K 73.4K
XrmToolBox Open source 1.2026.9.78 September 30, 2026 653 7.5K
Todoist Proprietary 9.33.1 October 26, 2026 — 13.9K
t-clock Other licence 2.4.4 — 5.9K
Cal Open source 1.10.1 January 18, 2026 49.2K —
DooTask Open source 1.10.12 October 22, 2026 5.6K —
Miro Proprietary 0.11.196 October 23, 2026 — 3.7K
Focalboard Open source 7.11.3 September 15, 2023 26.5K —
Sunsama Proprietary 3.4.15 October 15, 2026 — 157
Japplis Watch Free 1.1 March 10, 2025 — 549
Pomodoro Logger Open source 0.6.3 March 19, 2022 1.2K —
grocy-desktop Open source 2.15.0 March 19, 2026 389 —