There are quite a few good ones left!
Here is a list of a few with their # of results in google listed alongside.
Domain Ext Google
zie.in zie in 71,900,000
haz.in haz in 55,800,000
feu.in feu in 44,100,000
gdy.in gdy in 42,400,000
nej.in nej in 39,700,000
tog.in tog in 33,500,000
nah.in nah in 32,700,000
tvw.in tvw in 32,700,000
sgh.in sgh in 32,300,000
zug.in zug in 28,700,000
thy.in thy in 27,900,000
svi.in svi in 27,700,000
lys.in lys in 26,700,000
zr.in zr in 26,300,000
hkm.in hkm in 25,100,000
vou.in vou in 23,400,000
zol.in zol in 22,500,000
puo.in puo in 20,400,000
ytl.in ytl in 19,600,000
puy.in puy in 19,400,000
cov.in cov in 18,800,000
yol.in yol in 17,900,000
yun.in yun in 17,900,000
zda.in zda in 17,500,000
kuu.in kuu in 17,400,000
xis.in xis in 17,100,000
caf.in caf in 16,900,000