Bookmarks

• cheat.sh: accessible via curl or a browser.
• cheatsheets.zip
• Free for dev: online tools with free tiers.
• edX: introduction to Linux

Online tools

• MikuTools: a collection of small useful online tools.
• 免費資源網路社群 (Traditional Chinese): a collection of free tools.

Math tools

• Desmos graphing calculator
• Geogebra
• Detexify

Document Processing

• draw.io: Flow chart and diagram maker.
• Microsoft designer: AI-generated cover designs.
• My Graph Paper: Templates for graph papers and notebooks.
• PDF24: 24 free PDF tools.
• SlidesGo: Free Google Slides and PowerPoint templates.
• Word templates: Microsoft Word templates.
• Typst : The new foundation for documents as an alternative to LaTeX.

Regex

• Regex 101
• Regexr
• Regex tester

C/C++

• Compiler explorer: assembly for a C/C++ code snippet.
• Quick C++ benchmarks

Shell programming

• awesome-shell
• Shell check
• Explain shell
• Learn Bash in Y minutes
• Ryan’s Tutorial