Store all your passwords in one secure encrypted database.
Universal Password Manager allows you to store all your passwords in one highly secure encrypted database. Its strengths are simplicity, portability and security (uses 128bit AES encryption). UPM is available on Android, Windows, OS X & Linux.
CryptoPad is a Java based file encryptor ! It can encrypt every type of file. The icing on the cake is that it's 100% cross-platform. i.e. You can run the same .jar file on Windows, Mac OS, Linux and any OS capable of running JRE 8 :)
CryptoPad uses AES-128 bit symmetric key encryption to secure your data.
WebLOQ IO is a Java NIO framework which allows for tens of thousands of concurrent TCP/IP connections through a very small thread pool (assuming proper OS and network settings). There is built in support for SSL and non-SSL connections.