Linguistics
- 1901
- Interlingua pro viagiatores (English)
- Basic Interlingua for travellers, at travlang.com. With sound.
- 1903
- Concise English-Interlingua Dictionary
- A modified version of the 1987 dictionary by F.P. Gopsill and B.C. Sexton.
- 1904
- Uniono por la Linguo Internaciona (Ido)
- Official site of Ido, the international language. Site in Ido and tens of other languages.
- 1905
- Elektronala dicionario de la linguo internaciona Ido
- Interactive multilingual dictionary of the international language Ido. In Ido.
- 1906
- Ido
- An encyclopedia article on Ido, including sections on grammar, history and international conventions.
- 1907
- The International Language Ido
- Contains numerous downloadable plain text resources, including Ido wordlists (dictionaries) for English, German, French, and Italian.
- 1908
- Glosa Designed Language
- Presentation of Glosa by Robin Gaskell. About Glosa's inventor, its features, samples, prose with parallel text in English, children's stories, learning materials and what is IAL.
- 1909
- Glosa Dictionaries
- Brief introduction to Glosa, links to related pages, contacts to "Glosalist" discussions, notes on Glosa synonyms, omissions and agglutination.
- 1910
- Glosa.org
- Information the Glosa language with learning and text materials, links, mailing lists and their organization.
- 1911
- Esperanto: Multlingva Inform-Centro
- Multilingual Information Center about Esperanto: Information in many languages about Esperanto
- 1912
- Esperanto
- Description of Esperanto with answers to arguments against its use as an international language.
- 1916
- Esperanto.org
- Esperanto portal includes links to learning guides and organizations around the world.