Just throwing the solutions I've found onto the suggestion heap... I prefer to keep all my passwords in an encrypted flat text file, for one thing because I keep more than web site passwords in there, so web-specific password managers don't meet all my needs.

If you're an Emacs user, as of version 23 or so GNU Emacs can transparently read and write GnuPG-encrypted .txt.gpg (or .org.gpg, or...) files. Not that there aren't plenty other ways to save encrypted text, but it's nice to have something that's integrated into the program you spend half your time in anyway...

If you use Windows but not Emacs, Steganos LockNote is a free, minimalist program offering symmetric AES encryption — it's a standalone .exe containing both the program and your data, so you just double-click on the .exe "document" to open your encrypted file in a Notepad-like interface. I doubt it has been vetted to the extent that GnuPG has, but it's surely enough to keep your average laptop thief from getting all your passwords.