marketcap.one is a website and EOS Block Producer that tracks the price, market capitalizations and other metrics for EOS.IO tokens.  It was launched in January, 2019.  As of June, 2019 it tracks 93 tokens with a total marketcap of over $600 million. 
In February 2019 marketcap.one released a TokenDominance feature which tracks total marketcap of all tokens in relation to the total marketcap for EOS.
a new design
historical price charts for all tokens
relevant links for all projects including: social media, whitepaper, GitHub, Everipedia articles and exchanges
support for Chaince and DEXEOS
volume and change % added to homepage
comprehensive metrics for each token, including: historical volume, supply data, all-time high and low and more
Block Producer candidacy
Marketcap: total value of all created tokens, calculated by multiplying total supply and price.
Total marketcap: total value of all created tokens, calculated by multiplying total supply and price.
Marketcap rank: rank among marketcaps of all tokens, excluding EOS.
Fully diluted: total value of all tokens that can ever be created, calculated by multiplying max supply and price.
Total supply: total number of tokens that have been created.
Max supply: total number of tokens that can ever be created.
% of total marketcap: marketcap as a % of total marketcap of all tokens, excluding EOS.
Token Dominance: total marketcap of all tokens as a % of EOS marketcap.