社区版完全免费，功能完整。直播、视频学习、试题练习、测试、考试、学习证明、成绩打印，实现“学、练、考”一体。适用于在线教育、知识付费、企业内训、员工考评、企业商学院等。
用Wpf做一个Diagram画板（包含流程图FlowChart，思维导图MindEditor，可编程模块等等）
OK插件是免费开源的PowerPoint第三方平面设计辅助插件
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