Do you have any tools that do Build and Clean functions like in ArcInfo?
No, and I have not seen any free ArcView extensions that include ArcInfo-like Build and Clean functions. However, you might want to check out SSIArcPoly at the following web location: http://www.Spatial-Online.com/Spatial/product.asp?pf_id=0 The cost is reasonable and they do have a free trial available.