6 Fast‑Rising Open‑Source Projects to Watch This Week

1. Microsoft AI Agents for Beginners

Stars this week: 2,399. Microsoft open‑source an AI Agent learning course with videos, code, slides, and extra material, aimed at beginners. Repository: https://github.com/microsoft/ai-agents-for-beginners.

2. Nautilus Trader – High‑Performance Quant Trading Platform

Stars this week: 870. Provides a fast algorithmic trading and back‑testing engine, handling large market data streams, simulating order execution and market events, and includes technical indicators such as ADX, MACD, RSI. Repository: https://github.com/nautechsystems/nautilus_trader.

3. System Design Primer

Stars this week: 2,749. A comprehensive open‑source learning repository that teaches how to design large‑scale systems like YouTube or Weibo, covering servers, databases, networking, and user experience. Repository: https://github.com/donnemartin/system-design-primer.

4. Postiz – Social Media Management Tool

Stars this week: 863. Open‑source app that helps manage accounts on platforms such as Twitter, Facebook, TikTok, and YouTube, offering AI‑driven activity analysis, optimal posting time suggestions, content optimization, and multi‑user collaboration. Repository: https://github.com/gitroomhq/postiz-app.

5. Anthropic Courses

Stars this week: 2,353. A set of five progressive tutorials released by Anthropic to teach effective use of Claude models and API, focusing on prompt engineering and API integration. Repository: https://github.com/anthropics/courses.

6. BillionMail – Self‑Hosted Email Service

Stars this week: 2,187. Enables users to run their own mail server for newsletters and marketing, fully free and customizable, with features for sending, list management, and privacy control. Repository: https://github.com/aaPanel/BillionMail.