Swahili. If you want to translate “she/he went to the river”, you say “Alienda mtoni” which collapses she/he into the subject A- (Alienda) to mean “the person”. You always need context to use a gendered word (like mwanamke for woman) otherwise general conversation does not foreground it. There is literally no word for he/she in Swahili, as far as I know.
Findroid/Finamp? Quite robust.
Link: https://github.com/jmshrv/finamp