GeoGebra - the world’s favorite, free math tools used by over 100 million students and teachers
MCTool刘明野的工具箱提供在线音乐解析，在线视频解析，MD5在线加密，更多好用、易用的工具还在不断添加中，欢迎访问！
AI人工智能图片放大
有时候拿到的图片画质很差，可以通过它放大，效果还不错
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Simplify documentation and avoid heavy tools. Open source Visio Alternative. Commonly used for explaining your code! Mermaid is a simple markdown-like script language for generating charts from text via javascript.
