HashLighter is a light version of TagPredict, and as its name says – it is highlighting hashtags on your screen. You can set the highlight color (yellow, green or red) and also decide if you want to highlight hashtags (i.e. #something) or at-tags (i.e. @something).
HashLighter is available at the Google Webstore – for free – and is a “one click” installation process. Just add it to your browser, and you will be able to get hashtags highlighted:
The difference between HashLighter and TagPredict is that it does not give you any live statistics (note that TagPredict is also free). so if you are just interested in highlighting hashtags, HashLighter will fit you better.