Examples of powerful LaTeX packages and techniques in use — a great way to learn LaTeX by example. Search or browse below.

Typeset the source code documentation for TeX, e-TeX or pdfTeX
This project typesets the source code documentation for 3 TeX engines: Knuth's TeX, e-TeX or pdfTeX—by default it typesets the source code for e-TeX. All .tex source files were extracted from the original WEB source code after processing via a Web2C-based workflow. To typeset the documentation for a particular engine, just uncomment the relevant line in main.tex and comment out the others.
Graham Douglas

Pseudocode Example
An example showing how to use pseudocode in Algorithmcx.
IserlohnArchmage

Scientific writing - Typesetting exercise
University of Tehran scientific writing exercise. Semester Spring 2019
Mohammadreza Osouli

Transmissão e distribuição de energia
Exemplo de aula para Instituto Federal de Santa Catarina, do curso técnico em eletrotécnica do campus Jaraguá do Sul (Rau). O modelo será aprimorado futuramente. Não sou o autor original do modelo, mas fiz algumas adaptações. O autor original é o prof. Emerson Ribeiro de Mello do campus São José.
Arthur Garcia Bartsch, Emerson Ribeiro de Mello

A region \(R\) of space-time produced by field \(\Phi_{\mu}\)
A sketch of the region \(R\) of space-time produced by field \(\Phi_{\mu}\). The figure is inspired in figure 3.3 of the book ``Quantum Field Theory'' by Lewis H. Ryder.
Alexsandro Lucena Mota

Approximating the Overleaf logo with LaTeX
This is an example or typesetting an approximation of the Overleaf logo, using the freely available fonts TeX Gyre Adventor and academicons.
We hope you like it! We created it in response to a request from an Overleaf user who wished to include the sentence This document was created in \overleaf in their project. If you'd like to use this in your projects, please feel free to, but please also bear in mind our Acceptable Use Policy; the logo shouldn't be used to imply something is 'official' or otherwise endorsed by Overleaf.
If you have any questions about it please get in touch!
Overleaf

LuaTeX: Parsing typeset paragraphs
This example is a LuaTeX-based plain TeX project which implements a LuaTeX callback function to show the components of a typeset paragraph. It is designed to accompany a blog post and, for simplicity, it is not a full-blown “parser”—for example, it is not recursive and ignores a number of node types. However, it offers a useful starting point for anyone wishing to explore callbacks in more detail.
Graham Douglas

Bibliography management: splitting-up a bibliography with BibLaTeX
This example shows how to split your bibliography into different sections using BibLaTeX.
This example was originally published on ShareLaTeX and subsequently moved to Overleaf in November 2019.
Uploaded from ShareLaTeX

Bibliography management: BibTeX example
An example showing how to use BibTeX to manage your bibliography.
This example was originally published on ShareLaTeX and subsequently moved to Overleaf in November 2019.
Uploaded from ShareLateX