Lists of websites

This is a list of lists of websites, sorted by type and subject, including comparisons and other lists of lists.

By type
• Academic databases and search engines

• BitTorrent (comparison)

• Blogs

• Chat

• Databases

• Dating (comparison)

• Dictionaries

• Encyclopedias

• Forums

• Photo sharing

• Question-and-answer

• Search engines

• Social bookmarking

• Social networking

• * Defunct social networking

• Tor hidden services

• Video sharing

• Virtual communities

• Webcomics

• Web directories

• Wikis

By subject
• Biology

• * Biodiversity databases

• * Biological wikis

• Educational videos

• Environmental

• Food and drink

• Health

• Video gaming

• Professional wrestling

Blocked

 * Blocked in China
 * Blocked in Russia
 * Blocked in the United Kingdom

Other

 * Founded before 1995
 * Most popular