Encyclopedia

TV Tropes, the all-devouring pop-culture wiki, catalogs and cross-references recurrent plot devices, archetypes, and tropes in all forms of media.

Encyclopedia about Estonia

Visualize country borders from different times in history (2000 BC-1994)

A resource dedicated to establishing the field of formalised subjective effect documentation.

Statistics, data analyses and comparisons for all countries in the world.

Kids encyclopedia facts from Kiddle

HandWiki - Wiki Encyclopedia of Science, Technology and Computing for collaborative editing of articles dedicated to science and applications of computers, software and programming

This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio such as the RTL-SDR, Airspy, SDRPlay, HackRF, BladeRF, Funcube Dongle, USRP or others.

Encyclopedia Mythica is the premier encyclopedia on mythology, folklore, and religion. Instant mythology since 1995.

Metapedia is an electronic encyclopedia about culture, art, science, philosophy and politics.

Golden is mapping human knowledge by using machine intelligence to make the world’s first self-constructing encyclopedia. Golden contains millions of connected topics and allows users to create, contribute and compare knowledge within a powerful wiki.