Here is the corrected version of the (in)famous JLEdits Patch.
     It applies only to standard Angband, version 2.9.2. It is fully 
compatible with all platforms, and with standard versions of Angband, 
but not with previous versions of this patch unless you wish to seriously
mess up the monster memory and graphics. If you have a character going in 
a game with a previous version of this patch, finish that character off
before upgrading.

Instructions:

(1) Download.

(2) Unzip.

(3) Copy over the entire "edit", "file" and "help" folders to replace the
    corresponding files in the \lib folder.

(4) Delete the contents of the \lib\data folder, but not the folder itself.

(5) Play.

Features:
Lots of new monsters, ego-item types, artifacts. A couple of new standard
objects as well. Some older stuff has been changed, most notably dragons 
are nastier in melee, and chaos/confusion resistances have been properly 
split: if you are relying on Balance or Chaos Dragon Scale Mail, or the 
shield of Thorin or the artifact weapons Doomcaller or Zarcuthra for your
confusion resistance, you will need another source. Such a source can be 
quite easily found, appearing as it does on a certain well-known amulet 
whose current price is far too high to justify its powers in standard 
Angband...