New posts in Document Classes

A mode to produce a document in one language or the other

How can I use \if \then \else with \@ifclassloaded{}

Declaring option a4paper in \documentclass produces different margins than declaring it in \geometry

How to change document font size in preamble from 11pt to say 12pt?

tcolorbox breaks the verbatim definition of ltugboat documentclass

You have requested document class X but the document class provides Y warning

Where can I find the article.cls class file of texlive-2016 on my pc?

Problem with `statsoc` class and pdflatex

Creating a re-usable tikz graph template

Where can I find old versions of book.cls?