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since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

processon是一款专业在线作图工具和知识分享社区，提供ai生成思维导图流程图。支持思维导图、流程图、组织结构图、网络拓扑图、鱼骨图、uml图等多种图形，同时可实现人与人之间的实时协作和共享，提升团队工作效率。

interactive open source numerical library of c/c++ functions for engineering, finance, maths, science and statistics. with online calculators for numerical components and excel add-ins.

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