The Hadoop Ecosystem Table

If you start learning about Big Data and start googling with this concept one of most keywords collected is Hadoop: an open-source software for processing incredibly large datasets, etc...,  but when digging deeper into it you get a lot more, and so on and so forth.

You get confused and start reading some books to organize your thoughts about these new concepts. You find a lot of technologies. The more you find  the more you get, they don't stop emerging continuously!

Isn't there an index with these technologies categorized and a brief summary of them?
Yes! there is a project on GitHub which keeps the track of Hadoop related projects, hahah: The Hadoop Ecosystem Table