Development 3 Application software 2 Computer programming 2 Ruby (Computer program language) 2 Ruby on rails (Electronic resource) 2 Authoring programs 1 Cascading style sheets 1 Computer software 1 Git (Computer file) 1 HTML (Document markup language) 1 JavaScript (Computer program language) 1 Object-oriented programming (Computer science) 1 Python (Computer program language) 1 Web applications 1 Web site development 1 Web sites 1