Dart SDK All In One
Dart SDK archive
https://dart.dev/tools/sdk/archive
The Dart SDK has the libraries and command-line tools that you need to develop Dart web, command-line, and server apps.
If you’re developing Flutter apps, then you don’t need the Dart SDK; just install Flutter.
$ dart --version
Dart SDK 2.10
Dart SDK 2.8.4 (stable)