StuDocu

Standout features:

• Bright and friendly design
• User-friendly search engine
• Sticky main navigation

StuDocu is one of the most well-crafted colourful websites for educational document sharing. It was founded in 2013 by four students to exchange documents and improve grades. Later, this idea became a first-notch educational business helping students all over the world to have access to complete educational information. Consequently, this business can not have a plain website design with over 25M users.

Not only does it achieve its primary mission - streamlined education, but the website is also easy on the eyes, in a way that it is simultaneously appealing and focus-oriented. Now that's deserving of an "A" in our opinion.