This is my version of the most used ArcView 3x extensions. You can download the compilation HERE. All AVX file inside it need to be copied to your C:ESRIAV_GIS30ARCVIEWEXT32 directory. The extensions are :
Add XY Coordinate
Add DMS
Advance Snapping Tool
AV Tools
CLU Quality COntrol
Convert Vertex to Point
Count Overlapping Polygons
DNR Forestry Extension
Edit Tools 31
Edit Tools 36
EZ Click Tools 32
Graticule in Geographic
Hotling Browser
Hydrologic Modeling
Hydrologic Modeling 11
Identify and Edit 1.13
Layout Add Table Graphic
Project File Organizer
Remove Duplicate Coincident Points
Stream Mode
WG Tool (be careful using this extension, you need to turn it off before close the ArcView)
ArcInfo Extension
XTools 9.15.03
