• Microsoft Learn / Entity Framework is a modern object-relation mapper that lets you build a clean, portable, and high-level data access layer with .NET (C#) across a variety of databases, including SQL Database (on-premises and Azure), SQLite, MySQL, PostgreSQL, and Azure Cosmos DB. It supports LINQ queries, change tracking, updates, and schema migrations.
• Prisma | Next-generation ORM for Node.js & TypeScript
  • Prisma Blog
    • Improving query performance with database indexes using Prisma: B-tree indexes

Wikipedia

• Object–relational impedance mismatch
• Список ORM-библиотек