Atomikos: java trans­ac­tion man­ag­er soft­ware

Here is a nice tool that can take care of back-end sys­tem in­te­gra­tion and java trans­ac­tion man­age­ment. The Trans­ac­tions prod­uct is a JTA (java trans­ac­tion API) im­ple­men­ta­tion with full re­cov­ery un­der the hood. It in­te­grates with most J2EE ap­pli­ca­tion servers as well as with J2SE ap­pli­ca­tions, and adds trans­ac­tion­al ro­bust­ness, and au­to­mat­ic re­cov­ery on-the-fly. Per­fect for your on­line trans­ac­tion pro­cess­ing (OLTP)!

Some of the sup­port­ed ap­pli­ca­tion servers are:
-Tom­cat (JTA trans­ac­tions)
-JBoss (JTA trans­ac­tions with RMI/IIOP sup­port)
-Web­sphere Ex­press
-ServletEx­ec (by New At­lanta)
Here is more in­for­ma­tion about trans­ac­tion pro­cess­ing soft­ware.
Al­ter­na­tive­ly, go di­rect­ly to the JTA down­load.