Compress JPEG and GIG images. SiteOwner - Check HTML links and spelling. Bobby - Analyzes web page for browser compatibility and accessibility to people with disabilities. The program can check multiple local files or entire web sites at one time. Available in several platforms, including generic Java.
Editor has many features such as spell checker and thesaurus.
JPEG Wizard - Edit and shrink JPEG images without recompressing. Mathew's Webtools - Perl and shell scripts to validate HTML, fix spelling, and validate links. Creates a sitemap and verifies hyperlinks for 1 page, directory, subdirectories, or entire website. WebLint - HTML syntax and minimal style checker. A Perl script which picks fluff off HTML pages.