Excalidraw

Keploy is an open-source, AI-powered test-generation platform for developers. It generates unit, integration, and end-to-end tests and realistic data mocks and gets 90% code test coverage within 2 minutes. Keploy can continuously monitor live environments for different user behaviour and can generate, and maintain test suites with high test coverage. These tests are then run in secure lightweight virtual environments in CI/CD or on a developer's laptop.

Townie is an AI-powered code generation assistant by Val Town, designed to help developers quickly create, deploy, and iterate code. It combines features from tools like GitHub Copilot, Cursor, Windsurf, v0.dev, and Bolt, offering instant deployment and debugging for rapid app development.

MarsCode provides an IDE with a built-in AI Assistant and extensions that support over 100 languages and mainstream IDEs.