Spre

An NPC Tool to edit or create NPCs for those who do not have a basic knoweledge.
This tool only goes soo far, it is a few years old, still has all the main functions but no new functions for new script commands. If I can ever get my hands on the source since it was written in delphi I will update it with modern times. However it is STILL very useful.
Now an editor should not be used as a 100% sure thing, after you save your script you should still go through it to make sure all syntax is correct.
I did not make this, I claim no credit for this.

The One and only Toolbox you need for Clients, This collection was released Years ago by Zaku, and obviously can never seem to stay active(all the links for it by everyone including mine(oops) have gone silent.
This contains the following programs, and in my opinion the only ones you need, I have used them for years with Zero issues
GPFs:
FileLister(used by the create program to pack files in a GRF
GRFFactory(Used to View and decompress your GRF)

CLient:
RATZ(Used to Compile RGZ files for patching any none DataDirectory Items)
DePack(to depack your RGZ file)
Reshacker(To change your icon for your EXE file Very user friendly)
Maldiablos DiffPatcher