PDFCrowd might be a bit more popular than Who Can Use. We know about 1 link to it since March 2021 and only 1 link to Who Can Use. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You can also use whocanuse.com to check the colour contrast of a text/background combo, and tweak one or both colours to find an accessible combination. Source: about 2 years ago
To follow on with this, I've used https://pdfcrowd.com/ too. Source: about 3 years ago
Colour Contrast Analyser - TPGi's ADA Color Contrast Checker checks for helps determine the accessibility the contrast ratio of two colors for WCAG AA and AAA.
pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Cron Color - Free web tool for designing color palettes and checking contrasts.
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Kontrast - Check and adjust web element contrast in real time.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request