FreeToolCrate is one static site. This page lists the tools. Each calculator or generator has its own path, so someone who only wanted a Minecraft circle is not forced through a general-purpose account. The software is the page. There is no application to install and no API key you have to bring.
The Malaysian tools are written in English and use the Malay names people actually search for: kira CGPA, kira gaji bersih, KWSP, PERKESO. Grade-point tables and statutory rates are copied from the public documents named on those pages, and the salary rates live in one file that is dated, so a later year can be updated without hunting through the layout. Where a document could not be confirmed, the page says verify with your faculty or your payroll instead of filling the gap quietly.
Advertising uses Google AdSense. The tools stay usable around it: the form is the first thing on the page, and an ad is never styled as the button that runs the calculation. Privacy and terms for the whole network are the pages linked from every footer.
The contact address is not live yet. The contact page says so, rather than inventing a mailbox.