MiscCrypto

Under Windows

CryptTool

• Demonstration and Reference Program for Cryptography + making AES executables
• freeware

AxCrypt

• AES-128 File Encryption, Compression and double-click Edit/View for secure document storage on Windows 95/98/ME/NT/2K/XP, locally or remote.
• GPL

Zip 2 Secure EXE

• AES-128/192/256 bits File Encryption, Create self-extracting EXE files from zip files
• freeware

Misc

To unlock password-protected pdfs

• apt-get install gs-common xpdf-utils
• pdftops -upw <file_password> <file>.pdf -|ps2pdf - <file>_open.pdf