SynApp2 should work with most or all recent releases of Oracle.
I've only tried SynApp2 with the 10g Express Edition (XE). The short version of SynApp2 installation instructions should get you going with XE. If you've got a different release of Oracle, you'll probably have to make an edit to one of the SynApp2 source files.
The detailed version of SynApp2 installation instructions cover what will probably need to be changed.
See http://www.synapp2.org/documentation/_release_/synapp2.install.Oracle.txt
If you have success with another version of Oracle, please be sure to post your findings.
- Richard