Apps with 'Challenges' feature

Learning has never been this social and accessible for so many! Bit-sized videos and fun practice sessions grab your attention and keep you focused, for guaranteed best results!.

Free versatile geoquiz web application. Includes random street view drops, popular landmarks or a flag guessing mode. Single player modes as well as synchronous multiplayer supported!.

GeoGuessr is a web-based geographic discovery game designed by Anton Wallén, a Swedish IT consultant, released on 9 May 2013. The game uses a semi-randomized Google Street View location and requires players to guess their location in the...

Earn points for your life experiences. Find lists that interest you and mark off the things you've done - movies you've seen, books you've read, foods you've eaten, places you've visited and much more.

Vulnerable Client-Server Application (VuCSA) is made for learning/presenting how to perform penetration tests of non-http thick clients. It is written in Java (with JavaFX graphical user interface).

Want to improve your health, lose some weight, get an elegant body shape or, vice versa, become a hefty bodybuilder? Challenge yourself and achieve that!.

Take part in the exciting adventure of magical worlds with hundreds of levels filled with mind boggling word puzzles. Can you escape the rising waters, unlock the locked letters or outsmart the Ruzzlers?

An engaging comment system that offers competitive features to increase traffic and engagement for a passionate user-base.

An interesting and addictive game around with a twist.

Real Dev is a platform to challenge developers with real-life coding tasks. It's also a recruiting assessment tool for business to hire engineers with practical skills.

Hack This Site is a free training ground for users to test and expand their hacking skills. Our community is dedicated to facilitating an open learning environment by providing a series of hacking challenges, articles, resources, and discussion of the latest happenings in hacker...