Killendar keeps your appointments in a single file on your own machine, with optional SQLCipher AES-256 encryption at rest once you set a password. Month, week, day and agenda views, color categories, recurring appointments, and iCalendar import and export. Unlocked it is an ordinary SQLite database you can read, back up, or copy to another machine. Runs portable or installs for you or every user - no account, no sync, no telemetry. Open source under GPLv3.
Publisher’s description
What is Killendar?
Killendar is an open-source project management program for Windows from Steve the Killer. It ranks 27th by popularity among project management in this catalogue. It is written in C#.
Installation and requirements
Official installers exist for 64-bit as EXE. Installation asks for administrator rights. The installer supports unattended (silent) installation.
Updates and version history
The current version is 1.4.0, released on October 22, 2026. 10 versions are listed since July 31, 2026, each with links to its own installer files. The last update is less than a month old.
Popularity and file types
The Chocolatey package has been downloaded 94 times. The source code on GitHub (SteveTheKiller/Killendar) has 10 stars. On Windows it registers 2 file types, including .ics and .kcal. Similar programs include GanttProject, XrmToolBox and Todoist.
Project description on GitHub: “A fast, private desktop calendar for Windows. Month, week, work week, day and agenda views, recurring appointments, color categories, ICS import and export, and optional password encryption. Nothing leaves your machine.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Updated in the last two months
Cons
- No native ARM64 build
- Installation needs administrator rights
In short: Killendar is an open-source project management tool for 64-bit PCs. Administrators can deploy it unattended.
Is Killendar safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
67F57A5900F12322250A88ACA291D1074EFB66C85FAFAADD8FB4DE9BA7819A28· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 10 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 1.4.0Latest | October 22, 2026 | — | 64-bit EXE |
| 1.3.1 | October 19, 2026 | — | 64-bit EXE |
| 1.3.0 | October 15, 2026 | — | 64-bit EXE |
| 1.2.0 | October 7, 2026 | — | 64-bit Portable |
| 1.1.4 | September 28, 2026 | — | 64-bit Portable |
| 1.1.3 | September 2, 2026 | — | 64-bit Portable |
| 1.1.2 | September 2, 2026 | — | 64-bit Portable |
| 1.1.1 | September 2, 2026 | — | 64-bit Portable |
Install from the command line
Silent install ›winget install --id SteveTheKiller.Killendar -echoco install killendar -yKillendar.exe /silentRelated guide: How to use winget: install and update apps
Information
- Publisher
- Steve the Killer
- Category
- Project management
- Licence
- GPL-3.0
- Price
- Free
- Source code
- github.com/SteveTheKiller/Killendar
- Written in
- C#
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- EXE
- Version
- 1.4.0
- Released
- October 22, 2026
- Added to the catalogue
- August 7, 2026
- Versions listed
- 10
- Chocolatey downloads
- 94
- GitHub stars
- 10
- GitHub forks
- 1
- Website
- github.com
- winget ID
- SteveTheKiller.Killendar
- Chocolatey package
- killendar
File types it opens (2)
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Killendar free?
Yes. Killendar is open-source software under the GPL-3.0 licence.
Is Killendar safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Killendar with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Killendar be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Killendar run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of Killendar?
The versions page lists all 10 versions with links to their official installer files, back to July 31, 2026.
What are alternatives to Killendar?
GanttProject, XrmToolBox, Todoist, t-clock and Cal. The alternatives page compares them.
