Based on our record, Pennywise seems to be more popular. It has been mentiond 1 time since March 2021. 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.
Afloat - Don't know if it will work for macOS 12. If it's just for safari alone, you can try Pennywise. Source: about 2 years ago
HTML Validator - HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
W3C Markup Validation Service - Validates HTML markup of web pages, one at a time.
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
Rocket Validator - Site-wide Accessibility and HTML validation made easy. With a single click, Rocket Validator will check thousands of web pages on your site for Accessibility and HTML conformance, producing a detailed, actionable report on seconds.
PiPer - A DIY Minecraft computer to build gadgets