- Google Video (this is really YouTube now)
- iGoogle - A widget based portal that's very useful, it'll be unfortunate to see it go.
- Google Reader - An RSS reader services that I don't think can be easily replaced.
Recently Google announced "Google Note", this is meant to be a competitor to the very popular Evernote reader. The difference I'm assuming is that Google Note will be 100% free, while with Evernote you can pay to get extra services and space. The problem with Google Note is that if I use it, I'm going to use it because I want to have my information in the same place in the next 10 years, so that when I go to look something up, it'll still be there. Now there's nothing saying that Evernote will be around in 10 years, but given the recent culling of services from Google, I feel that Evernote has a better chance of surviving than Google Note.
I'm sure that tools such as Google Search and Google Mail are safe, but what about Gtalk (Google Chat service) or Google Voice (Google's VOIP service). If Google wants to push ad revenue maybe they'll shut off IMAP access to Gmail, this would force you to use the web client to see your mail or pay a premium to access services ad free. I guess that's fair, but if they did that I'd hope that Google would then leave all my personal information alone (including their scanning of my emails and such). It could be argued by the conspiracy theorists that Google has stood up some services to gather information about us, by now they should have a very good baseline of what users use and how they behave.
RIP Google Reader
Google Reader was more than just an RSS reader, it was an RSS aggregator that you could personalize with just about any free RSS feed. I could access Google Reader using Reeder on my desktop or Flipboard on my iPad and have it sync the items I've read properly. Both Reeder and Flipboard has said they will automatically migrate my feeds to their service, but what they most likely won't do is sync these feeds with each other (which makes them useless as RSS readers for me). While I admit that I'm griping that a free service that I didn't pay the normal cost of viewing ads to use is going away, it's because this was such a simple service that behaved brilliantly and it's going to be very sad to see it go.