Here’s a list of popular online encyclopedias:
1. **Wikipedia** - A free, collaboratively edited online encyclopedia with articles on a wide range of topics.
2. **Encyclopaedia Britannica** - A well-known reference work providing reliable articles on various subjects, available both online and in print.
3. **Stanford Encyclopedia of Philosophy** - A peer-reviewed online resource that provides in-depth articles on philosophy topics.
4. **World