Just rediscovered pwgen which I had forgotten all about.

I'm still a fan of Secure Memorable Passwords for personal use though.

But pwgen is great if you are wanting to automate installations and require random mysql table prefixes:

# mysql table prefixes
pwgen -A 3 2 -1
7ey
y4q

# complex passwords 
pwgen -c -n -y -B 20 1
oot7vang7aeshi\a7eig

# db login details
pwgen -c -n 64 1
anaepahfaeFoofoo6vaewogicai3aebai3ekoongeewai9ua5ohjai9Oog3ahThe