Google Webmaster Tools has always been a way to see some backlinks to your pages on a site you control. They’ve recently made a change to give you a “link download option” where you can download a full list of backlinks to your site and include a column for dates each link was discovered.
This way you can check and see how old your oldest links are as well as what links have surfaced recently.
To find this option, go to your site inside Webmaster Tools, click on Traffic->Links to Your Site. Then from there choose “More >>” under either “Who links the most” or under “Your most linked content”. On the following page you have three options:
- Download this table
- Download more sample links
- Download latest links
You can see pictures and other details at Search Engine Roundtable.