Key Rack allows you to view, create and edit secrets, such as passwords or tokens, stored by apps. It supports both Flatpak secrets and system-wide keyrings.
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KWalletManager Alternatives
KWalletManager is described as 'By using the Frameworks wallet subsystem it not only allows you to keep your own secrets but also to access and manage the passwords of every application that integrates with the wallet' and is a password manager in the security & privacy category. There are more than 10 alternatives to KWalletManager for a variety of platforms, including Linux, Windows, Mac, Android and iPhone apps. The best KWalletManager alternative is Strongbox, which is both free and Open Source. Other great apps like KWalletManager are Password Safe, KeePassium, Seahorse and GNU Privacy Assistant.