Ⅰ.drawio
特点: 开源,免费,无需注册登录,有网页版、Windows、macOS、Linux、Google Chrome OS等多个版本
官网:https://www.diagrams.net/
GitHub:https://github.com/jgraph/drawio-desktop/releases
Ⅱ.iodraw
特点: 开源,免费,无需注册登录,有网页版、Windows版本
官网:https://www.iodraw.com/
Gitee:https://gitee.com/ixiaoyang8/iodraw/releases
GitHub:https://github.com/ixiaoyang8/iodraw/releases
百度网盘:https://pan.baidu.com/s/1T03izdWtRSeMqOXoT9HCug
提取码:draw