ArcGIS Toolbox for WhiteboxTools v0.1.0 release - Esri Community
ArcGIS Pro: 2.4.2: In general, ArcPro has less per... - Esri Community
How to build custom geoprocessing tools —ArcObjects 10.4 Help for Java | ArcGIS for Desktop
LINK - Desktop Decision Support Tools
The Best of ArcGIS 10.2
GitHub - Esri/incident-import-tools: Toolbox and scripts for importing spreadsheets to a gdb and optionally publishing out to ArcGIS Online or ArcGIS for Server.