KeePass is a free open source password manager that allows you to manage and store passwords in a secure way. This program allows you to put one or more passwords in one database. Protection of database is assured by a master key or a key file. You will need to remember one single password or select the key file to unlock the entire database. It offers many features, for example, KeePass supports the Advanced Encryption Standard (AES, Rijndael) and the Twofish algorithms to encrypt its password databases. KeePass is easy enough for a beginner and it is at the same time a complex application that can satisfy even a computer expert.
I could write entire pages about KeePass and it would be probably not enough. To be honest, you can find tons of information's even the program homepage comes with excellent resources and support. However I think I can mention here the most important aspects of this program. It's free, "open-source", "lightweight" and "easy-to-use" which is more than enough. I mean, when you want the best password manager you can expect to be shareware, that means that you need to pay for a full license. KeePass is another proof that "best things in life are free".
I tested this application on a computer running Windows 7. It took me several minutes to understand the basic features and usage. The program works excellent on Windows. As an advice, make sure to remember the "master password" which is going to let you access the entire database.
TIP: Do not create a single password for all of your accounts. If you have one password that you're using it at your email account, bank account, computer login or others you can be in great danger. Supposing that you are a phishing victim, if the bad person is going to access all your accounts with one password you can realize that this is a bad thing.
This is where KeePass will surpass your ability to remember long and complicated passwords and it will become your best friend. As a conclusion, this is "probably" the best, free password manager.