Backlink Checker Tools

Ahrefs (Limited free account available) – Updated more often than Majestic & SEOMoz and also shows much more detailed stats. You can also use it to see if people are 301’ing aged domains to sites which you don’t see in SEOMoz, very handy! ( YES )

SEOSpyGlass (Limited free version available) – This is part of SEO Powersuite which is essential for any SEO in my opinion. Allows you to check your/competitors backlinks and manage them all. Check for new links, deleted links, import your own and get some great statistics and reports. ( YES )

Google Webmaster Tools (Free) – Add your site to Google Webmaster Tools and you can download some of your backlinks, as far as SEO tools goes – it’s pretty awesome. ( YES )

Bing Site Explorer (Free) – The new kid on the block Bing Site Explorer gives you access to a sample of your backlinks. ( YES )

MajesticSEO (Limited free account available) – I dont really have a fair reason for discounting MajesticSEO other than I just don’t like it. I hate the interface and how the data is presented and it is overpriced compared to Ahrefs. ( NO )