What is Ithkuil?
Ithkuil is a constructed language, or 'conlang', created by John Quijada over a period from the mid-1970s to 2004. The intent of Ithkuil is to express complex and profound concepts in a maximally concise manner. Ithkuil expresses ideas in much shorter sentences than seen in English or most natural languages; for example, the English phrase On the contrary, I think it may turn out that this rugged mountain range trails off at some point would be translated as Tram-mļöi hhâsmařpţuktôx. Unlike conlangs like Esperanto that are intended as 'auxillary languages' and have significant numbers of speakers, there are no fluent speakers of Ithkuil, and its purpose is more philosophical and experimental.
Awesome, what are some of the more famous conlangs? Are they actively used for anything?