Ng-conf, the original AngularJS conference, just wrapped up this week. The big bang at the conference was the announcement of AngularJS 2 release candidate. The conference offered various talks and workshops on AngularJS 2 and the family of products being built around AngularJS 2 to make ng-developers' life smooth and easy. Here's a non-exhaustive list of tools, frameworks, libraries, etc that were introduced at ng-conf, that anyone wanting to use Angular 2 should at least know about...
Consolidated Angular 2 documentation
Head over to https://angular.io/ for everything Angular 2. This promises to be a one-stop shop for documentation, examples, and guides. The resources page specifically, has a great list of, well, resources! They also have a link to a form on that page, to submit any other resources not included that you think should be included.
Angular CLI is the command line interface for Angular 2.Using Angular CLI, you can create new angular applications or various angular components with simple commands. The generated files and structures already follow the Angular 2 best practices. The Angular CLI team hopes to take out the manual configuration steps in Angular 2 and hence make it easy for developers to write clean Angular 2 apps.
Angular Universal will allow server side rendering of Angular 2 apps.Server-side rendering has many benefits, such as better perceived performance and improved Search Engine Optimization.Server side rendering will also help ensure that social media sites correctly display a preview image of your app.What's noteworthy is that a .NET adapter for Angular Universal is already available, while adapters for Java, PHP etc are still in development.
Angular Mobile Toolkit
The Angular Mobile Toolkit will allow developers to build Progressive Web Apps using Angular 2. This would be the tool to use, if you're already using Angular and want to build a Web App (vs a Native app). One of the main advantages of Web Apps using the Angular Mobile Toolkit over Native Apps would be a single source code for cross-platform applications.
Angular Material will provide Material Design components for Angular 2 apps. Material Design is Google's visual design framework. This design language is mainly used for Android, but is slowly making its way to the web. Angular Material 2 will allow developers to build beautiful user interfaces without needed to write too much custom CSS.
Protractor is the official end-to-end testing framework for Angular apps. A powerful feature that Protractor provides is the automatic execution of the next step in your test the moment the webpage finishes pending tasks. This way you don't have to worry about waiting for your end-to-end test and webpage to sync.
Augury is a Chrome Dev Tools Extension that will help debug Angular 2 apps. It has many visual debugging capablities such as views of the Component hierarchy, Injector Graph, and Router Trees. It was formerly known as Batarang.This is an open source initiative from Rangle.io.
Codelyzer is a static code analysis tool that will offer analysis of Angular 2 apps and will help ensure that your code is following the Angular 2 Style Guide
NativeScript 2.0 offers the ability to develop native mobile apps using Angular 2.Nativescript converts Angular 2 code into native iOS and Android API calls, which would be executed as if you were writing native mobile applications in Objective-C/Swift or Java. It is an open source initiative from Telerik.
The Ionic Framework can also be used to make native and web apps. Ionic 2.0 is currently in Beta and also works with AngularJS 2.
Just a caveat - this is the list I gathered by attending various sessions at ng-conf and should offer a bird's eye view of the Angular 2 Ecosystem. I may add or remove from this list as I learn more. It's also worth nothing that most of these tools are still in their Alpha/Beta stages. Additionally, Angular 2 Ecosystem is a term I made up - I don't think it's a formal term...yet.