Webvisum has been dead, dead, dead for a long time now and all efforts I (and others that I know about) had made to contact the developers went unanswered.
The only one I'm aware of now is Rumola under Chromium-based browsers, and it is paid, but quite inexpensive. They give a 5-Captcha trial, but then it's 99 cents for 50 Captcha solves or $1.95 for 150 Captcha solves.
At the moment, I am unaware of any free ones.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
It’s hard waking up and realizing it’s not always black and white.
~ Kelley Boorn