JTOpen: The Open Source version of the IBM Toolbox for Java. Allows for JDBC connection to IBM i
IBM i Access Client Solutions
http://www-03.ibm.com/systems/power/software/i/access/solutions.html
DB2 command line interface
bash-4.3$ db2util "select * from SCHEMA/TABLE"
https://bitbucket.org/litmis/db2util
Maybe in the future:
https://github.com/coffeeandscripts/sqlcrush
Netbeans via JTOpen