Random password: 9cursSwoad
10 char (entropy-bits: known=33, unknown= 60- 65): 9cursSwoad
15 char (entropy-bits: known=49, unknown= 90- 98): MwaftlumpmagsG%
20 char (entropy-bits: known=66, unknown=120-131): Umilefads4RponyXlira
8 char all random (entropy-bits=48): HvuAeXUy
32 char all random (entropy-bits=192): $di5wUvSvt@!MKoit+aLx=Y6YpVDmhgV
"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.
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.