Google offers a wide variety apps including their search engine, e-mail provider, and YouTube. Because Google has such a wide variety of apps it is rare that you wont be able to find the app you are looking for from Google. Also Google is continually adding new apps to their web site.
Google is very customizable and gives you very basic apps like Google docs (an online version of Word, paint, ect.), their search engine, and their e-mail provider. Also they give you a selection of very specialized apps like their SketchUp or their new Picnic (picture editing).
If Google doesn't have an app you like at the moment I would not be surprised for them to have it with a year. Google is constantly adding new apps to list of over 40 apps! Google is a great place to start looking for the app you want because with with over 40 apps they are bound to have it.
