These mapping tools could be written in Avenue, MapBasic, Delphi, VB, or even Javascript & PHP. Choose one to see more:

Category / LinkDescription
IRIS SuiteA document management system incorporating fast scanning, viewing and analysis. Linkable to almost any GIS system.
ArcView 3.x ExtensionsA vast number of extensions and scripts for ArcView 3.x.
MapInfo ToolsVarious advanced tools for MapInfo, such as a dynamic and programmable macro builder.
ArcGIS Extensions'Premium Toolbar' add-ons for ArcGIS 8.x - 10.x.
Erdas Imagine ToolsPrograms that add various features to the image warping processes in Erdas Imagine.