What cryptocurrencies does our gas calculator support?

Good afternoon, I'm conducting a survey on cryptocurrency gas calculators and I'm interested in your platform's capabilities. Could you kindly elaborate on the range of cryptocurrencies that your gas calculator currently supports? I'm particularly curious about whether it covers the major coins such as Bitcoin, Ethereum, Litecoin, as well as some of the more emerging altcoins. Understanding the diversity of your supported cryptos would greatly assist me in evaluating the usefulness and versatility of your tool. Thank you for your time and attention to this inquiry.