KeePass uses AES-256 encryption for passwords which is practically unbreakable.

KeePass being open source means that a number of people have reviewed the code and found it to be secure.

KeePass is consistent and stable across all clients including merging conflicts between desktop and mobile apps.

No paid version. Free for everyone.

Offers large variety of apps with different features and user interfaces vastly increasing the user base by catering to almost every taste.

Unlike many other password management tools, by default the KeePass encrypted database is not stored in the cloud, but strictly locally, for added security.

e.g. KeePass Touch, MiniKeePass.

KeePass uses a feature called AutoType that pastes passwords in browser window using a combination of virtual keystrokes and clipboard obfuscation for added security against keyloggers.

This app has the easiest, cleanest, and clearest user interface. For reference, LastPass has progressively gotten worse and worse and is now a confusing mess, while Keepass remains very user-friendly.

On average a new point release is available every 3 months.

Entries can be categorized in folders and subfolders and quickly found using search.

Keepass offers a combination of master password, key file and user account verification.

With the built-in history you can lookup previous passwords, track changes in general and if necessary recover those. In essence you are looking at a built-in Version Control System (VCS) which operates on single entries. Browsing the history of specific entries also displays associated metadata like the date of a change.

Keepass offers a range of plugins and extensions in different categories: Integration & Transfer, Automation & Scripting, Cryptography & Key Providers, and others.

Works as a portable application that does not need to be installed and can be carried around in an external device.

Password generator can be adjusted to use or exclude certain characters, patterns, external algorithms and principles.

Available for Windows, with unofficial ports for Linux, macOS, Android, and iOS.