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An open source web application for building, managing, and playtesting Magic the Gathering cubes. Maintained by dekkerglen on GitHub, where it has earned 261 stars from the community.

Makes sure you don't accidentally deploy apps with missing or invalid environment variables. Maintained by KATT on GitHub, where it has earned 805 stars from the community.

Laudspeaker is an Open Source Customer Engagement and Product Onboarding Platform. Open Source alternative to Braze / One Signal / Customer Io / Appcues / Pendo. Use Laudspeaker to design product onboarding flows and send product and event triggered emails, sms, push and more. Maintained by laudspeaker on GitHub, where it has earned 2,620 stars from the community.