I could have sworn I saw an EFF (?) link back in June (post-Snowden) containing a list of FOSS alternatives to a bunch of services (Gmail, Skype, Google Analytics), etc. For some reason I can't find it now, though - hopefully someone else has this saved somewhere.
EDIT Thanks to vezzy-fnord below: https://prism-break.org/en/
They seem to have updated their layout since then, but I'm fairly certain this is the same site that I was referring to.