Netscape, in addition to <blink>, added <font>, <basefont>, changing the text color via an attribute of the <body> tag, attributes to change numbering style for <ol>, the height and width attributes of <img>, the background attribute of <body>, <center>, a bunch of attributes to <hr>, <ilayer>, <keygen>, <layer>, <multicol>, <nolayer>, <server>, <spacer>, <nobr>, <noembed>, <wbr>. <big>, <small>, <sub>, <sup>. I'm not sure if this is an exhaustive list.