Compare projects
Project comparisons allow you to view any selection of projects side by side just like they're shown on regular categories or in search results. You can try out an example or start yourself by adding a library to the comparison via the input below. You can also easily share your current comparison with others by sending the URL of the current page.
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MarkupValidity provides test/unit and rspec helpers for checking the validity of your documents. Shortcuts for verifying xhtml-transitional and xhtml-strict documents are provided as well. MarkupValidity will not only tell you when your document is invalid, but it will tell you what it *should* be.
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