WebObjects is a Java web application server and a server-based web application framework originally developed by NeXT Software, Inc. As of 2009 the software has been independently maintained by a volunteer community of Apple developers. WebObject's hallmark features are its object-orientation, database connectivity, and prototyping tools.
Objective-C and Swift are the development languages for iOS, Apple’s mobile operating system for the iPhone and iPad. based on the C programming language, with lots of object-oriented features added. Objective-C was originally developed in the early 1980s and influenced the design of Java. Swift is a thorough refinement of the language and the API conventions for the frameworks used in Apple’s macOS, iOS, watchOS and tvOS.
MySQL is the world's most popular open source relational database, supporting SQL-92.