Codewell.cc - Improve your HTML and CSS skills by practicing on real world design templates.
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Good Code - Free front end coding challenges
doopoll - Create live, instant, editable polls effortlessly
One Degree - The Human Search Engine
1World Online - 1World's Platform consists of applications like polls, quizzes, surveys, and debates to boost engagement and revenue opportunities.