Google PageRank Checker Tools
Google PageRank Calculator
Provides the number of incoming links for each URL you gave that links to the main page to get the PageRank estimation.
Google PageRank Prediction – lets you know the future Google PageRank of a particular website. Several calculations are made to come up with the figures.
Google PageRank Report
Checks the Google PageRank of several URLs in one hit.
Multi DataCenter PageRank Checker – through submitting a query to multiple Google DataCenters, any alterations in PageRank values of a website are checked.
Can check the Google PageRank values of several URLs right away which saves a lot of time.
Using any keywords you want, you can search Google using this tool. The search results are displayed according to relevance with a graphical bar containing the PageRank value of the particular site.
Code Validation Tools
Atom and RSS Feed Validator
Atom and RSS Feed Validator is a tool used to validate syndicated feeds. The tool works well with RSS 0.90, 0.91, 0.93, 0.94, 1.0, 1.1 and 2.0. It can also validate Atom feeds. RSS is inadequately implemented by numerous tools regardless of its fairly simple nature. The aim of the validator is to let you know if the RSS is correctly produced or not through translating the text into code. The IETF standard Atom format for syndicated feeds is also supported.
W3C Markup Validation Service
Checks the validity of the markup used in the web documents with HTML, XHTML, SMIL, and MathML extensions. If you like to validate your CSS you can use W3C CSS Validation Service.
Since popular search engines index clean-coded websites immediately. PageRank and code validation tools are also important when it comes to search engine optimization.