website2org.el downloads a website, transforms it into minimalist Orgmode, and presents the results as either a temporary Orgmode buffer or creates an .org file in a specified directory.
Might be useful for conversion of my few HTML pages to Orgmode.

Works only for places in Germany. See https://forecast.solar/ for a potential alternative.

jq is like sed for JSON data - you can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep and friends let you play with text.

This section of the site offers RF engineers quick access to popular calculators and design aids. They are useful at design time and for training purposes, both of which stimulated their development and use over the years. Each tool is written in Javascript and the user can view the page source should they wish to examine the implementation.

I have tried to include references to the various books/papers that I have used in the development of each tool and although I have used them all at various times and believe them to be accurate, please use due diligence and further simulate where necessary.

Most of the tools come with sample values pre-entered into each input box to offer a degree of help. I apologise if this bothers you, but from the feedback I receive, it is generally preferred.

Please be sure to have read the "terms of use". The link is available at the bottom of every page.

Cscope is a developer's tool for browsing source code. It has an impeccable Unix pedigree, having been originally developed at Bell Labs back in the days of the PDP-11. Cscope was part of the official AT&T Unix distribution for many years, and has been used to manage projects involving 20 million lines of code!
Found on the TUHS mailing list
https://minnie.tuhs.org/mailman3/hyperkitty/list/tuhs@tuhs.org/thread/XORIHRWCFZKNWHB2DXNVRX7LXU4DDIZ2/

Tool to answer questions about unicode characters.

Karl Voit describes how he uses tags to organize information. The rules might be useful for my Shaarli bookmarks.

Found on Tim Bradshaw's home page https://www.tfeb.org/
require-module sounds interesting.

Use the power of Org to manage accounts and install software the way the author likes.

Python to RPN converter for generating programs for the HP42S and DM42 calculators (and emulators like Free42).
From https://www.hpmuseum.org/forum/thread-10178-post-177378.html#pid177378
MIT licensed according to README.md