SEO Macroscope
SEO Macroscope is a website scanning tool, to check your website for broken links; including some technical SEO functionality, site scraping, Excel reporting, and more.
Pixiple searches your files for images that are similar in pixel and/or metadata content and presents you with a sorted list of similar image pairs to compare and manipulate. Pixiple is open source, no-nonsense, unrestricted and completely free.