Markup by Kdan mobile is a browser extension which makes reading and taking notes easy with features like text highlight, text summary, instant share and cloud storage for all your saved articles.
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Permarker is a free Firefox extension to highlight text on webpages. Whenever you open that webpage again, you will be able to see the highlighted text.
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glossed.it (or Gloss) is an online text highlighter service that helps to save important text and read saved highlights later on.
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Marker.To is a free web marker or highlighter that allows you to highlight text over web pages and share it. Try Marker.To Free.
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