• eTechou PDF Planner has been open sourced!
  4/3/2022

• PDF Planner 2021 (for iPad + apple pencil)
  12/1/2021

• Proof without words: trigonometric differentiation
  10/3/2020

• LaTeX Typesetting Chinese Character and PinYin Box
  2/2/2020

• New Year and New Document
  13/1/2020

• Maxima cheat sheet
  8/3/2019

• Julia cheat sheet v1.0
  10/2/2019

• LaTeX Template for My Notes in 2018
  30/1/2018

• LaTeX math cheat sheet
  25/7/2017

• Typesetting Lyrics of Japanese/Chinese Songs with LuaTeX
  2/8/2016

• A LaTeX Note Template
  19/11/2014