6. 06/06/09 For a Better Future Why to Adopt ADF & JDeveloper Continue. The ability to provide applications as a web-delivered service - If moving from an Oracle Forms legacy system, JDeveloper and ADF allows organizations to provide a web-delivered application, changing their systems from an internally focused application, to a publically available service. ADF is free if you already own OAS - For existing OAS licensed sites, ADF is free to deploy, leveraging your existing expenditure. Staff retention - Are your Oracle Forms IT staff leaving after getting bored by having to maintain your legacy systems? ADF provides a chance to work on a new technology which is compelling for staff. Training courses are available from Oracle and other parties - Detailed training courses are available allowing managers to plan a skills transfer or upgrade to the JDeveloper & ADF platforms.