SEO PowerSuite is an all-in-one pack of SEO software for professional website promoters. Money-back guarantee if you don't see results within the first 30 days.

4 cutting-edge SEO tools that help you overtake competitors in the SERPs in no time:

• Rank Tracker is a top-notch keyword suggestion tool that employs 19 keyword research methods to bring you the highest-paying search terms in the niche. It then tracks site rankings for those keywords in over 300 local and global SEs.
• WebSite Auditor guides you through on-page SEO. It helps you make your site 100% crawlable for search engines and wisely use your keywords in site's content.
• Link Assistant brings you tons of relevant link partners to connect with. Thanks to the in-built email client, you can manage your link building campaign at ease. Just pick the partners you like, send them emails in just a click - then verify backlinks to your site.
• SEO SpyGlass is a killer competition research SEO tool. It looks behind the scenes of a competitor's site and lets you see their full backlink structure. Besides, it tells you each linking URL's IP address, domain age, Google PR, Alexa rank, and more.

SEO PowerSuite is available in three different levels: Free, Pro, and Enterprise. The price quoted below is for the Pro version. You can find feature comparisons here, and pricing information here.