Frameworks
Backend
- Appwrite — open-source backend platform (auth, databases, storage, functions, messaging, realtime, hosting); self-hostable Firebase alternative
Learning Management
Learning Management System (LMS)
Payments and billing
- Autumn — open-source pricing and billing platform; a layer between Stripe and your app for subscriptions, credit systems, usage-based models, and custom plans without handling webhooks, upgrades/downgrades, or failed payments.