Nibbler - Free tool for testing how good your website is, and what you can do to improve it. Check accessibility, SEO, social media, compliance and more.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
tota11y - An accessibility visualization toolkit from Khan Academy
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Accessible Metrics - Digital Governance
X1 Search - X1's Lightning-Fast Search Software. Premium Alternative to Windows Desktop and Outlook Search.