Oddly enough, the part of Frog Fractions I enjoyed the most was the text adventure stuff. So, I wanna find a couple good sci fi text adventures to play through. Any suggestions?
The Hitchhiker's Guide to the Galaxy was quite fun. Might not be what you're after, but you never know. Check it out! :)
There's also a standard text-only edition out there somewhere.
Also, here's a couple of resources for you to browse through. You'll find a very nice database located here.
and if I may make a recommendation, it's not sci-fi, but it is a short and quite hilarious text-adventure that I thought was worth taking the time to look at.
It's called Lost Pig