Use Dropbox? This tool is AWESOME! Drop files into your dropbox from any user with an Internet connection. Password protection means that only files you want people to upload make it into your box. Super cool! (can you tell I'm excited?)
Our freetechnologyforteachers blogger Richard Byrne has developed an excellent guide for some of the less well-used features of Google's apps suite (or should I say, "sweet" ;)
Keepass2 with the KeeFox Firefox Add-on and Dropbox to make it available to all my computers and devices is wonderful. On my iOS devices I use MiniKeePass to have my passwords with me everywhere. It is all free too.