- Sci-Hub
- Library Genesis
- Annual Reviews
- Paper Digest – AI-Powered Research Platform
- Learn X in Y minutes
- Quick Reference
- The Missing Semester of Your CS Education
- CS自学指南
- Draw online:
- LaTeX:
- Mathcha:Visual LaTeX editor, export TikZ code.
- LaTeX Live
- TikZBolg
- Carbon
- Snippet generator
- Markdown Online
- What's your IP
- Color Hunt