Here some old tools / pograms are listed which are no longer actively maintained.
Summary of sub-pages in this category
This is an old graph plotting tool built sometime around year 2005, when online plotting tools were non-existent (to my knowledge). The output plot is generated purely in PHP from scratch, utilizing pixel-by-pixel basic line drawing capability without using any plotting package or 3rd party ut...
This is an old tool for online rendering Latex commands. It was built when online rendering of Latex was not a thing (AFIK).
Latex is rendered and displayed using Cgi and PHP scripts. The tool also provide a GUI for easy insertion of Latex symbols and components.