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

Mini-livre: Trigonométrie
Trigonométrie anti-sèche résumé de cours de seconde. Mini-livre 8 A7 sur un A4 recto.
cheatsheet antiseche pocketmod minibook trig sin cos circle cercle
Vincent PANTALONI

Typesetting Z specifications with zed-csp
Examples from the zed-csp documentation.
LianTze Lim

Week work
Weekly Timetable Calendar
LaTeX Template
Version 1.1 (4/6/13)
This template has been downloaded from:
LaTeXTemplates.com
Original calendar style author:
Evan Sultanik
License: CC BY-NC-SA 3.0
Rodrigo Aguilar

Individual LaTeX Exercise
This is the training exercise for AguaClara team members to learn how to use LaTeX and Overleaf. Use this as an opportunity to get to know Overleaf, LaTeX, your teammates, and even yourself better!
William

Bài trắc nghiệm nộp cho thầy
Example math quiz/exam in Vietnamese
phamdohai

Bungee_Model
Bungee, Spring
Andreas Kelbel

Mehr Flaschenzüge
Flaschenzug, pulley
Andreas Kelbel

Flaschenzug
Flaschenzug, pulley
Andreas Kelbel

Using PSTricks with pdflatex on Overleaf
PSTricks drawings can't be compiled under pdflatex and lualatex (Frequently done errors #5). Instead, compilation with XeLaTeX is preferred if you need to use .jpg/.png/.pdf images in your project.
But if you absolutely need to compile with pdflatex, this example demonstrates how to use PStricks with pdflatex using auto-pst-pdf on Overleaf (But you still can't use .jpg/.png/.pdf images within your PSTricks drawings).
LianTze Lim (Overleaf)