Gibberbot, an Android app to support XMPP Jabber chat using OTR encryption
https://guardianproject.info/apps/gibberbot

It includes OTR4J:
http://code.google.com/p/otr4j/

and BouncyCastle for Java:
http://www.bouncycastle.org/java.html

and SQLCipher for Android:
https://guardianproject.info/code/sqlcipher/