I have found that bookmarklets are a quick, handy way to handle small tasks, and I have reported several SEO bookmarklets in the past. Here is another list that may be useful to you in your SEO daily work.
- Show Non PR Links
- Linking to this site on Google
- Pages from this site on Google
- Word count
- Keyword density check
You can grab any or all of these at www.andybudd.com/bookmarklets.