SQLCipher is an open source extension to SQLite that provides transparent 256-bit AES encryption of database files.
A repackage of Bouncy Castle for Android (which ships a crippled version of BC).
This is an Android Library Project that provides multiple means to improve network security in mobile applications.
Conceal provides a set of easy to use APIs for performing fast encryption and authentication of data. Apps can use Conceal to encrypt data and large files stored in public locations, for example SD cards.
AndroidPinning is a standalone Android library project that facilitates certificate pinning for SSL connections from Android apps, in order to minimize dependence on Certificate Authorities.
Secrets for Android is an application to securely store and manage passwords and secrets on your Android phone. It uses techniques like strong encryption and auto-logout to help ensure that your secrets remain safe (assuming you use a good master password!). Context-sensitive tips guide you along through its operation, making it easy to use.