It looks like a 14 day trial now, maybe, but it was previously as long as you used it simply for linking your facebook:
https://chunkhost.com/Another that I used for a bit, however they were flaky, and now "require" you to install some anti-virus to participate. Instead click the download link as it allows you to proceed to the registration page but
do not install the AV (unless you really want to...):
http://www.host1free.com/vps-registration/Just remember you get what you pay for.
I have since abandoned both free vps's in favor of
http://webfaction.com or if you are feeling so kind
http://www.webfaction.com?affiliate=bitspill