Added exceptional design challenges:

 

To discover more on a particular Challenge, checkout the hyperlink.

Fashion ChallengeCreativity ChallengePurple ChallengeInterior Furniture Challenge
The One and Only ChallengeConference ChallengeCreation ChallengeRewarding Challenge
Magnificient ChallengeJournal ChallengePublishers ChallengeCollege of Design Challenge
Advanced ChallengeGreatest Products ChallengeGreatest Design Pieces ChallengeDesign Thinking Challenge
Favorite ChallengeThe Best of All ChallengeTop Architecture ChallengeProfessional Designers Challenge
Pioneers ChallengeHuman Resources ChallengeBusiness Plan ChallengeCorporate Plans Challenge
Residency ChallengeScholarship Programs ChallengeCookware ChallengeArt Works Challenge
Business Strategy ChallengeTrophy ChallengeDisplay Units ChallengeConference Centers Challenge
Blogging ChallengeAcademical ChallengeSafety Clothing ChallengeTradefair Centers Challenge
Transparent Goods ChallengeAlmanacs ChallengeProsumer Tools ChallengeMathematics and Nature Challenge
Additionally see: Catalog of Design Challenge | <- Index