https://umbraco.com/
Umbraco - the flexible open-source .NET CMS
Mar 17, 2026 - Umbraco is the leading open-source ASP.NET Core CMS | More than 700,000 websites worldwide are powered by our flexible and editor-friendly CMS
flexible open sourceumbraco
https://devsuite.co/flexprice
Flexprice: Flexible open-source billing infrastructure for any pricing model – DevSuite
Complete metering and billing platform that handles usage tracking, pricing plans, credit management, and invoicing for modern SaaS businesses
flexible open sourcebilling