A list of all the awesome resources out there I have found in my quest to build a slide rule
The International Slide Rule Museum - The de-facto reference source for detailed information, both technical and historical. Very complete image catalog and manual collections
The Oughtred Society - One of a few of professional organizations dedicated to mechanical calculation
All About Astro - First personal page I stumbled upon. Very detailed. Also check out his Astrophotography! (the reason I found it - he is Texas based)
Slide rules are not being made any more and existing ones break, so emulators are a nice way to perserve them for people to learn and get a taste for physical ones. This was the beginning of my journey into the rabbit hole
Wolf's Collection of Slide Rule Replicas - Part 1 and Part2 – This is the emulator replica collection connected with the ISRM (see above). The breadth of this collection is amazing. Part2 is an image oriented catalog + a Curta Model II simulator.
Astron's Linear Slide Rule - Uber simple, directories are browsable, single JS file, easy to understand source code.
The Slide Rule Simulator – Via the Wayback Machine. Desktop app for Windows and and old version of MacOS. Surprisingly extensable for defining new scales. Written in C++.
IWA WERN 1638 Slide Rule Simulator – Another complex circular slide rule. Simulated in GeoGebra!
These are resources, usually programs to generate resources to make physical, to size, replicas of slide rule scales
derekp7's Postscript Silde Rule Engine - A single Poscrtipt file to generate a PDF or to print any combination of scales to print out for use on a physical replica. About 6 complete slide rule scale sets in here. Including Ultralog, and circular slide rule! This was actually the first piece of code I looked at when I began my initial search. Postscript is all text and Derek has done a great job of making scale creation and extension pretty easy. Locally you can easily make PDF's with GhostScript and the ps2pdf command line tool.
Javier Lopez's Silde-Rule - Python program to generate scales. Produces PNG's and scaled ones for cutting out stickers on a Silhouette craft cutter.
Javier Lopez's Instructable Article for Making a Physical Slide Rule - Uses the previous program to generate the scales.
Circular Slide Rule Made With a Laser Cutter - Video and instruction on making a circular slide rule, also from Instructables
Nuclear Bomb Effects Computer - Reconstruction of a rare circular slide rule distributed in a Department of Energy report by John Walker. Detailed instructions here and here. Github repo
UltraLog 0973 - An attempt to make a modern slide rule manufactured with modern methods
Dylan's Interactive Haskell Scale Generator – A nice interactive Haskell based tool to generate scales for replicas. Simple ScaleSpec datastructure with examples to make any scale you can concieve of - even circular ones!