Which S/W should i opt for website development / design for coding purpose

Myself Sylvie Skew, presently a homemaker. I am planning to again start my career after a long time.I have experience in application development, but now I want to start with website development and designing. I already have knowledge of HTML, Oracle, MySql. But for Frontend coding which S/W should I learn? So many are available in market today. Should be PHP or Java Script or Java itself etc.