- Buttercup
- Have I Been Pwned: Check if your email has been compromised in a data breach
- Key derivation function on Wikipedia
- Sallar Kaboli on GitHub
- Buttercup Roadmap
- Why I love password managers
- reproducible-builds.org
- The Changelog #237: Reproducible Builds and Secure Software with Chris Lamb
- ownCloud - The leading OpenSource Cloud Collaboration Platform
- Nextcloud
- KeePass Password Safe
- Open Source Password Management Solutions