i think the good altcoin under $1 is TRX, it has a good prospect in several months, give it try and buy that coin, the price will be pump up, and now the price at $0,22.
Actually the price is $0.17 at the moment. It has taken a big plunge in the past few hours
But, It's still a great price to pick up some Tron IMO, especially if you are looking for a long-term investment.