Ask HN: Which tools do you use for tracking your SEO

I use http://www.positionly.com for SERP tracking.

I use http://micrositemasters.com for SERP tracking; Majestic SEO is great for monitoring backlinks but expensive. You can also use SEOMOZ for free for a month.

I'm not so naive to think that people aren't already doing this all the time, but how is that the SaaS products mentioned in other comments are able to (and/or confident they will continue to be able to) avoid getting a C&D letter from Google? Isn't this a violation of their ToS?

Even using a supported API--which for Google seems to be limited to 100 queries per day--the search engines are officially OK with the submitting queries for the sole purpose of monitoring rankings?

(Looking at Google's new-ish terms of service, I see they are much vaguer about this now. E.g., "Don’t misuse our Services. For example, don’t interfere with our Services or try to access them using a method other than the interface and the instructions that we provide." " rel="nofollow">http://www.google.com/intl/en/policies/terms/>)

There's a whole host of commercial tools out there (SEOMoz, SeoBook, Raven, SEMRush) which professionals use, but unless you're making revenue from your site they're probably not worth investing in.

You can however use Google Webmaster Tools that will give you basic SERP data.

MSM is great.