Here is a list of the thechnologies I have experience through my career as a software developer and I have been polishing through many different projects.

Ruby is an interpreted, high-level, general-purpose programming language. It was designed with an emphasis on programming productivity and simplicity. In Ruby, everything is an object, including primitive data types. It was developed in the mid-1990s by Yukihiro "Matz" Matsumoto in Japan.
JavaScript is a programming language that is one of the core technologies of the World Wide Web. All major web browsers have a dedicated engine to execute Javascript code on users' devices.
Structured Query Language is a standardized programming language that is used to manage relational databases and perform various operations on the data in them.
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language such as HTML. CSS is a cornerstone technology of the World Wide Web.
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The HyperText Markup Language, or HTML, is the standard markup language for documents designed to be displayed in a web browser. HTML describes the structure of a web page semantically and contains the building blocks of a web page.