Hello,
Yes, I have been thinking about releasing individual free versions based off of the supported forms found in the pro version.
The plugins would be very similar to the Contract Form 7 image captcha plugin with extra features only available in the All-in-one Image CAPTCHA pro plugin.
At the moment, aside from the CF7 Image CAPTCHA plugin, I also have a free version for Gravity Forms and the login screen, I am looking at adding one for WPForms which has just been added to the pro plugin, WooComerce, and the possibly the default comment system.
The biggest deterrent was the amount of time it takes with maintaining each free plugin and managing support, but I am strongly considering it.
