Very simple plugin, every male gendered word is changed to the feminine version and vice-versa.
The only issue I really face with this is that in English the gender neutral pronoun is either 'they' (It really is! or 'he', with 'he' being adopted as the more popular usage. Aside from that I saw this mentioned recently on Hubski and I started using it again. It's weird to see how differently I respond to men and women on the internet and even weirder to see how everyone else appears, at least to me, to be replying "wrongly" when their gendered language is reversed.