5GB free. Google Docs and files converted to Google Docs do not count against storage limit. 1GB of free photo video storage in Picasa Web Albums, unlimited storage of photos and videos (up to 15-minute videos) in Google+.
Not free, but cheap - $5/month for unlimited storage
7 Gb free storage
5 Gb free ($6/month unlimited storage)
5 Gb free storage and $1 per Gb extra storage