Free software also tends to last a lot longer than proprietary software* and that means you get an absurd cross section of every goofy naming trend in the last several decades. So you've got your abbreviations with your acronyms with your hacker cultures with your overconfidently naming it the most generic thing possibles with your unrelated nouns with your nonsense toy names.

*Well, most projects die immediately, same as with proprietary. But at the long tail there are 40 year old programs still kicking