Who has custom tools for ArcGIS? Can you share and show us what they are?
I don't know specifically who has custom tools for ArcGIS, but you can browse and search for custom tools in the ArcGIS Marketplace on Esri's official website, or look for tools shared by other developers in the ArcGIS Developers Community. In addition, you can also search for relevant keywords online to find sharing resources on other websites or forums.