- Markdown Usage: https://gist.github.com/ihoneymon/652be052a0727ad59601
- Markdown Editor: https://jbt.github.io/markdown-editor/
- Test Regular expressions: https://regex101.com
- String Diff: https://www.diffchecker.com
- Trello(project management): https://trello.com/
- Study Web Fonts: https://www.beautifulcss.com/archives/431
- Color Chart: https://htmlcolorcodes.com/color-chart/
- Font File to Base64 Encoder: https://www.giftofspeed.com/base64-encoder/
- Web Devloper Roadmap: https://github.com/kamranahmedse/developer-roadmap
- About Functional Programming(Korean): https://hyunseob.github.io/2017/05/08/what-is-functional-programming/
- 깃허브에서 사용되는 언어 순위: https://madnight.github.io/githut/
- 변수명 지어주는 서비스: https://www.curioustore.com/#!/util/naming
- 해시코드(한국의 스택오버플로우): https://hashcode.co.kr/
- Raphael(Vector Graphics): https://dmitrybaranovskiy.github.io/raphael/
- Study RaphaelJS: https://ohgyun.github.io/raphaeljs-learning-test/learning_test.html
- jsPDF(HTML5 PDF Generator): https://parall.ax/products/jspdf
- JSFiddle(Test JavaScript): https://jsfiddle.net/
- Can I Use?(Support tables for HTML5, CSS3, etc): https://caniuse.com/
- JS Comparison Table: https://dorey.github.io/JavaScript-Equality-Table/ or https://zero.milosz.ca/
- QUnit(JavaScript Unit Testing framework): https://qunitjs.com/
- iOS Support Matrix: https://iossupportmatrix.com/
- Swift translation project for korean: https://swift.leantra.kr/