Ido is an alternative to Esperanto with similar grammar rules and pronunciation, but less complex conjugations and no need for diacritics, instead using digraph

Ido is an alternative to Esperanto with similar grammar rules and pronunciation, but less complex conjugations and no need for diacritics, instead using digraphs and is thus easier to type. Ido is also gender neutral (rather, gender on nouns is optional) while Esperanto is not, which makes that part a bit easier to learn. The problem is that there are only about 1000 speakers, which is significantly less than Esperanto. And so learning resources are quite limited by comparison.