Are you looking for blocks in addition to those that come with AutoCAD?
I have just been sent in search of some Mechanical, Plumbing and Fire Protection blocks.
The first thing I’ll do is search some newgroups to find out where other CAD people go… some sites might be free, while others might charge.
If you’ve used any of these sites and have any opinions on the quality of their content, please post a comment.
search autodesk discussion groups for download free block
Or search AUGI for the same:
CAD Block Exchange Network
A Gallery of 3D Art & 3D Textures
Archivio Tecnico Grafico
Design & Drafting
Computer Aided Design, Graphics web sites
abscissa 3D CAD Models
of course, you might need a way to organize your blocks…
The Block Catalog Generator in ToolPac 7.0 will let you build a multi-page (layout) drawing ready to plot. http://www.dotsoft.com/toolpac.htm
DotSoft's DwgBrowser 1.0 will prepare a html document that can be brought into word and printed. http://www.dotsoft.com/dwgbrowser.htm
Remember that you can also build a tool palette from a selection of blocks, from within the Design Center.