https://dyne.org/tomb/ minimalistic command line tool based on Linux #dmcrypt and #LUKS
TRIM on Btrfs on LUKS on a sparse disk image served with NBD actually works. I love free software.
http://jedepannetonordi.fr/une-cle-usb-chiffree-avec-dm-crypt-luks/ chiffrement dm-crypt luks vie-privée windows