Stage One Software is the developer of FormulaForge, an add-in for Microsoft 365 Excel that helps users understand, construct, and debug spreadsheet formulas.
This website contains two experimental add-ins for Microsoft 365 Excel. It also contains a private development directory, access to which requires authorization by Stage One Software.
YoTest is a bare-bones add-in for Excel that corrects several problems in the code produced by the Yeoman Office Generator. To use it, download its manifest (yotest.xml) and sideload it in Excel. The code and documentation for YoTest is open-source and freely available on GitHub.
YeomanGuide is a work in progress. It will be an expanded version of YoTest. Its documentation describes issues concerning development tools, the Angular/TypeScript framework, and Microsoft 365 add-ins. To use it, download its manifest (yeomanguide.xml) and sideload it in Excel. The code and documentation for YeomanGuide is open-source and freely available on GitHub.
Please send comments and inquires to sgarland@stageonesoftware.com.