For all the great data that Google Webmaster Tools (GWT) offers, there are also some notable things missing. One that webmasters and search marketers have asked for is a way to track links over time. If you wanted a timeline of your inbound link counts from GWT, you had to chart them manually.
Glync Basic is a free Firefox plugin that integrates right into your Google Webmaster Center account and shows link data for the most recent 30 days. There’s also a paid version that tracks for 90 days and lets you add Yahoo link counts side-by-side (among other features).
While I haven’t tried it out yet myself, there’s no doubt this is a needed addition to any search marketer’s toolbox. You can read the glync announcement for more information, the download link, and a video showing how it works.