BlueSky is a set of functionalities for the Eclipse IDE to provide simple and efficient Web development (HTML, CSS, JS, JSon, Node.js...). It's meant to be an alternative to traditional Eclipse Web Tools Platform (WTP).
BlueSky is based on the Eclipse Generic Editor framework from Eclipse Platform, LSP4E and TM4E in order to provide editors based on TextMate grammars and VSCode Language Server. It also includes with Eclipse JSDT debuggers.
See 
Install into Eclipse IDE:
- With Eclipse Marketplace Client and https://marketplace.eclipse.org/content/bluesky-web-development-eclipse-ide-experimental, choose one of:
- Help > Eclipse Marketplace, search
BlueSkythen clickInstallor - drag
into Eclipse IDE, or
- Help > Eclipse Marketplace, search
- With Help > Install New Software... with p2 repo http://repository.jboss.org/nexus/content/unzip/unzip/org/eclipse/bluesky/repository/0.1.0-SNAPSHOT/repository-0.1.0-SNAPSHOT.zip-unzip/
In an Eclipse target platform definition:
Community support is currently available via GitHub issues. Contribution of Code and Documentation are welcome as GitHub Pull Request.