How do you get rid of the "lock" icon overlay on a custom geoprocessing tool in ArcToolbox?
This seems to appear even with the ESRI Sample Projects.
Contrary to the ESRI-provided sample, do not set IGPFunctionName.MinimumProduct when implementing IGPFunctionFactory.GetFunctionNames and IGPFunctionFactory.GetFunctionName (or any other IGPFunctionName related methods).
EDIT: You can of course set the property to the appropriate level. The ESRI sample uses the (highest) esriProductCode.esriProductCodeProfessional level (ArcInfo) which, in majority of cases, is not what you want.