In 1998, the first version of JDeveloper was based on a licensing of the JBuilder product from Borland. JDeveloper went through a complete rewrite to be based on Java, for its 9i (2001) version.
The 10g version (9.0.5) showcased the first release of the revamped Oracle ADF.
In 2005 Oracle Corporation released JDeveloper as free software.
In 2006, still under the 10g tag, and after significant delays, Oracle released version 10.1.3 - the latest major 10g release.
In October 2006, Oracle released version 10.1.3.1 that added support for the final EJB 3.0 spec along with BPEL and ESB design time.
In January 2007, Oracle released version 10.1.3.2 incorporating WebCenter capabilities such as creating and consuming portlets, portlet/JSF bridge, and content-repository data control.
In January 2007 Oracle had more than 150 people working in various roles on the product, including (in no particular order): developers, development managers, QA engineers, build engineers, doc writers, product managers, customer evangelists, and usability engineers. Development centers operated in Redwood Shores, Bangalore, Reading (UK), Pleasanton, Colorado. Source:
In May 2007 Oracle released a technology preview release of version 11g.
In October 2008 the production version of Oracle JDeveloper 11g, code named BOXER, became available.
In July 2009 JDeveloper 11g version 18.104.22.168.0, code named Bulldog, became available
In June 2011 JDeveloper 11g (22.214.171.124.0), code name Sherman, became available 
In September 2011 Jdeveloper 11g (126.96.36.199.0 Build 6081), R2/PS1 became available 
In May 2012 Jdeveloper 11g (188.8.131.52.0 Build 6183), R2/PS2 became available 
In September 2012 Jdeveloper 11g (184.108.40.206.0 Build 6276.1), R2/PS3 became available 
In May 2013 Jdeveloper 11g (220.127.116.11.0 Build 6436), R2/PS4 became available