Boost WordPress performance: Faster localization, (on the fly) dynamic image resizing and CDN support for images.
Improve your images: Sharpens resized JPG image uploads via ImageMagick so it keeps quality, EXIF information, color profiles and crops.
Optimizing content for your target audience has never been easier.
Webmaster.Net Post Quality Analyzer is a simple lite-weight plugin to analyze the quality of your posts.
Analyze the home page of your WordPress site directly from your backoffice and get a quality and performance report.
This plugin adjusts the quality of the images when they are uploaded.
Get better uploaded quality or save bandwidth: Change the JPEG compression-level of uploaded images and thumbnails.
Designed for SEO and understanding the Google Panda by connecting a blog with the TOP Quality Analytics which measures the quality of landing pages.
WordPress uses a default quality of 90% for images served on the website, to conserve space and bandwidth. This plugin forces it to be 100%.
WP-Simonbot allows you to monitor and check your wordpress front-end performance automatically.
Theme Mentor is a cousin of the Theme-Check plugin getting deeper into the code analysis.
Preflightcheck runs various php test scripts to avoid errors when developing and deploying. Preflightcheck is easily extensible.