I couldn’t live without one these days. I personally use Bitwarden. I have tried most of the other manager suggested in this thread. They each their own benefits. I would recommend one of the hosted services for most people (1password, Bitwarden, not LastPass). I came to prefer Bitwarden for their combination of features and openness. I have self hosted it in the past, but these days just use their hosted service.

There are a lot of side benefits to using one besides just remembering your usernames and passwords for you too.

• It lets you use catch-all emails if you have your own email domain
  • allows you to give services their own address to track abuse
  • makes you more resistant to someone taking your leaked credentials from one site and using it for another
  • easier spam filtering
• Most password managers support random password generation
• Saving things that aren’t logins
  • Family member’s SSNs and DL numbers
  • Credit cards
  • Wifi passwords
  • Gate codes
• Sharing always up to date passwords and other secrets with people (for hosted options)
• 2FA is easier