1) Python Web CodePad:  http://python.linhtruong.com/

A Tool for developer to Code and Run Python inside your Browser

2) Visual Web Design Tool:   http://webdesign.linhtruong.com/

A Tool for Web Developer to design a website by HTML, JavaScript, CSS, and BootStrap Visually

3) JavaScript Web CodePad:  http://javascript.linhtruong.com/

A Tool for developer to Code and Run JavaScript inside your Browser

4) Database Management Tool: http://Database.LinhTruong.com/

A Tool for Design, Manage, Testing, and Query Database

5) Website Speed Test: http://LinhTruong.com/project/speedtest/

A Tool to test speed of a website