phee78,
Its difficult to tell for certain what species or hybrid that is,but heres trying.
My first thought is that its a fairly common C.acaulis species plant. Or,a hybrid that has acaulis in its parentage.
Looks like a species acaulis that has been grown in low light,thus the elongated leaves,rather than the compact form you can find on the fcbs photo.
I would recommend that you put it in a location with high light,but not sun,(except for morning or evening sun),and see if it colors up some. If it does add some color other than green,we may be able to ID it as one of the hundreds of hybrids that are out there.
Bob

Thanks Bob!
There's a spot in the backyard that gets some dappled sunlight at the very end of the day, so maybe I'll stick 'em there and see what they do.

I thought maybe they were C.acaulis as well, considering all the green, but the pics I found of that one all seem to be more bright green and shiny, and these ones are more light green with kind of a silvery texture.

I don't know much about Crypts yet. I've been eyeing off the more impressive ones, but managed to snag this clump of about 9 plants for under $20, so figured that was as good a place as any to start a little Crypt collection. ;)

Hi Phee & Bob
This is my little cute Crypt. acaulis which look different from Phee's plants.

{{gwi:454911}}

I also have two unknown Crypt. which I lost the tag,
they came from Southen Explosure years ago.

{{gwi:454912}}

I think this one look quite like yours, but with some colored as I give them more light.
{{gwi:454913}}

Phee,
I think Stephania's last pic is your plant too,but... no name. I took a photo of 2 that might also be yours,but too soon to tell until yours has better lighting to help it along.
Bottom; acaulis (has that darker green center bar like yours)
Left; Green and Red (no red showing as yet,usually starts at tips)
Right; C.gurkenii (was all green,added redish tint in good light)

{{gwi:454914}}

Thanks for the help Stephania and Bob! I'll post an update when my guys have had some sun to let you know if they start showing some pink like the ones in your photos.