I know that the OP only asked for coins with lower circulating supply, but here are my top coins under $1:
1) Verge (XVG)
Price:$0.157 Circulating Supply:14,397,300,292 Market Cap:$2,264,824,912
2) Tron (TRX)
Price:$0.0369 Circulating Supply:65,748,192,475 Market Cap:$2,426,535,666
3) Dragonchain (DRGN)
Price:$0.844 Circulating Supply:238,421,940 Market Cap:$201,313,949
You should hop on this train now because it is created by Disney and is only at a low price still because it is only on two exchanges including:
https://www.kucoin.com/#/?r=1cHhQ4) Elixir (ELIX)
Price:$0.515 Circulating Supply:28,105,374 Market Cap:$14,489,220
This token has a very low price for its circulating supply, which is most likely caused by the fact that it is not on any main exchanges. Once they release their demo and get on some larger exchanges, it will rocket. It is also found on kucoin:
https://www.kucoin.com/#/?r=1cHhQ