Best voice feminization?

Heya girls. I have been transitioning for a while, but one thing I have been really struggling with is making my "new" voice, that i'm learning and practicing by degrees, into second nature.
Has anyone used files that, whether they were designed exclusively for this or not, really had any majorly feminizing effect on the voice?
Has anyone used files that, whether they were designed exclusively for this or not, really had any majorly feminizing effect on the voice?