The post discusses how linear algebra was utilized to develop an interactive diagramming editor named Schemio. The editor has been praised for its sleek look and feel, and it is noteworthy that it is open source, which could allow for further enhancements and community contributions. The author provides insights into the relevance of linear algebra in building such applications, indicating that many editors likely employ similar mathematical foundations for rendering graphics and user interactions. There are links shared by users that provide additional resources, including the project's GitHub page and relevant academic information on homogeneous coordinates.