Search giant Google introduced Google Notebook, a free online application that allowed users to save and organize clips of information while conducting online research, back in 2006. Latter in November 11. 2011 the service was discontinued by the company.
Google was known, to be working on Google Keep, a new note-taking app similar to Google Notebook. The new app is said to allow users to take notes, colour code them, save pictures and make checklists. Also, you can archive notes for future referencing.
In recent news, Google Keep was apparently up and running at https://drive.google.com/keep/, before it was taken down. However, AndroidPolice have managed to take some screen shots of the new site. This is not the first time, Google Keep has been spotted, as last year, Google accidentally included a screenshot in an official Google+ post which included a link labeled "save to Google Keep".
Note taking applications such as Evernote, Pocket and Onenote have become very popular, over a couple of years and it looks like, Google wants a piece of the action. There is no news on when the app may officially go live, again, but when it does, it is going to give other Note taking applications some serious competition.