Oracle On Windows vc Unix and Linux - Differences:

 http://www.dbametrix.com/ora-unix-linux-win.html

SOA:

http://www.seducaotecnologica.com.br/tutorial-soa-passo-a-passo-1/

Ruby On Rails:

http://codigofacilito.com/videos/tutorial_ruby_on_rails_agrega_logica_a_una_vista

http://guides.rubyonrails.org/configuring.html

Rest:

http://www.infoq.com/br/articles/rest-introduction

Info Ebooks:
http://it-ebooks-search.info/

http://ormlite.com/   .... Object Relational Mapping Lite (ORM Lite) provides some simple,lightweight functionality for persisting Java objects to SQL databases while avoiding the complexity andoverhead of more standard ORM packages.