Dart SDK

Dart SDK represents a free and set of software development tools, scripts, binaries and libraries required for creating, compiling, running and managing projects in the Dart programming language.
The downloaded package includes the Dart virtual machine (dart), compiler for Dart to JavaScript (dart2js), Dart static analyzer (dartanalyzer), Dart documentation generator (docgen), the Dart package manager called Pub, Dart code formatter (dartfmt). All of these, together with snapshots, resources and templates exist in the bin folder.
The include directory has the APIs, while lib has the libraries bundled with the Dart runtime environment. Additional packages can be downloaded. For example, you can implement support for asynchronous programming, JavaScript inter-operation, or mathematical constants and functions. You can also view tutorials, the programmers guide, samples, and a tour of Dart libraries.
Dart SDK is included in Dart Editor, the open-source Dart editor based on Eclipse, but it was retired by Google in favor of JetBrain IDEs, such as IntelliJ IDEA, PyCharm, PhpStorm, or WebStorm.
Dart is an open-source programming language designed by Google, which can be used for developing web, server and mobile applications. Its object-oriented and single-inheritance, based on classes, and uses C-style syntax.