Random password: HLwifehead
10 char (entropy-bits: known=33, unknown= 60- 65): HLwifehead
15 char (entropy-bits: known=49, unknown= 90- 98): -+fafftautmeltF
20 char (entropy-bits: known=66, unknown=120-131): feetfoeseasynoonG&4H
8 char all random (entropy-bits=48): R5AwEp=H
32 char all random (entropy-bits=192): D*FYNgH*a-qm7adk*+suW82q6pAtbEH8

"known" = attacker knows pattern of x words with x chars
"all random" excludes similar looking characters; 0OQ, 1Il| and B which looks like 8 in some fonts.

Also see:
GRC for completely random passwords
Lastpass web embedded auto password management
Password wallet multi platform password app for password management
OS X Password managers desktop apps.