The Eclipse project offers several download packages, each focused on some set of languages and/or execution platforms: C/C++, JS web development, Modeling tools etc.
Now, Eclipse is basically a single platform with multiple plugins / combinable repositories etc. But - how do I square that with the discrete download packages? Specifically, how do I achieve a "union of download package X and download package Y" for doing two kinds of development with the same IDE?
One thing you can do is:
However, this doesn't get you quite what you wanted. For example, I did this with Eclipse CDT and JSDT-related packages, but I still can't started a new project which is JS-focused - I still see only the same kinds of projects I saw with just the CDT download.