The AxeCrypt2Go version is a single file portable affair.
http://www.axantum.com/AxCrypt/Features.html
http://www.axantum.com/AxCrypt/Downloads.html
" FeaturesThe following are features that really set it apart from all other file encryption tools, commercial as well as free:
Double-click to edit/view with any application.
Automatic re-encryption after modification.
Absolutely no user configuration necessary or possible before use.
Open source under GNU General Public License.
12 languages in one executable distribution.
Extensive command-line interface for scripting and programming.Other features
Windows 2003/XP/Vista/2008/7 32- and 64-bit compatible.
AES encryption with 128-bit keys.
Edit an encrypted document directly with double-click.
Optional pass phrase cache - type pass phrases once per logon and/or reboot.
Automatic pass phrase validation before decryption or editing.
Key-File generation and support.
No options or user interface - easy to install and use.
Relatively light-weight, less than 1Mb download
Extensive command-line interface.
Server mode options.
Support for files larger than 4GB (except for self-decrypting files).
Dynamic brute force counter measure - iterative key wrapping.
Integrates well with web based file sharing services.
Selective compression before encryption - faster downloads/uploads.
Retains original file name and information of an encrypted file.
Integrated shredder.
Shredding of all temporary and encrypted plaintext files.
Secure memory handling - no keys or data in the paging file.
Industry standard algorithms.
Data integrity verification - no undetected modification.
Unique data encryption keys used for every file and (re-)encryption.
Easy to add more languages - contact me (I'm especially looking for Nordic languages)!
Open source - no backdoors.
Private branding support for commercial or corporate versions.
It's FREE!"