I need to encrypt a partition, truecrypt could use keyfiles, (images and other) Is there any other encryption tool with GUI which can encrypt entire partitions and not only files/folders?
Truecrypt's advice on this makes sense: use the native FDE that came with your operating system, i.e.
- Bitlocker on Windows
- FileVault on OSX
- whatever your distro suggests (typically Encrypted LVM) on Linux.
(This will not necessarily be a good fit for everyone, but without more details of an individual requirement, it's the best advice you can reasonably give.)