APIDog is a cost-effective alternative to Postman that offers all the features of the paid version at a lower price.Bitwarden, KeePassXC, Pass, Vaultier, KeePass, Buttercup, Psono, Teampass, Enpass, and passwordstore are open-source password manager alternatives.These password managers provide various features and focus on security, simplicity, collaboration, and customization.By utilizing open-source alternatives, users contribute to a secure and transparent ecosystem.