Various newfangled "social" tools are a poor replacement, or, rather, not a replacement at all - they lack structure, prioritization, and ability to put things away that Reader offered. It is understandable, then, that right now there's a frantic activity directed on salvaging Reader data and finding a replacement.
Let's try to keep things organized.
First of all, dataliberation.org offers a way to export Google Reader feeds.
Then, just in case, here's a petition to keep Reader alive (not that it's going to change anything, in fact, it may point out how weak the Reader user base is - but then again, it's not about the profit).
And, finally, in no particular order, replacements (this section will be updated as new candidates are discovered). Keep in mind that all links are raw, fact checking wasn't performed, and some of them might bite you (feedback will be appreciated, so we have both wall of fame and wall of shame).
- The Old Reader
- What is the best Android alternative to Google Reader?
- Tiny Tiny RSS
- netvibes
- SwarmIQ
- Feedly
- Prismatic
- NewsBlur (be prepared to cash out $1/month, for 64 feeds is a joke)
- Pulse (however, it is rumored that LinkedIn is buying it)
- Planet
- Brief (Firefox only)
- Feed2Imap
- FeedFiend
- The ultimate Google Reader alternatives list (not that ultimate)
- What's the Best RSS Reader Not Named Google Reader?
- Google Reader закрывают (см. комментарии)
- Feedly tops Google Reader in every way possible
- Python script migrates from dying Google Reader to Evernote
to be continued...