Hi,
There are lots of websites out there that you can create forms online for online use! Often they come with CAPTCHA. I have used quite a few different ones, but I would suggest taking a look at:
Create an online contact form with Response-O-Matic if your still looking around. However this will be a paid suscribtion, and based on the more submissions you want to receive, you can expect to pay more monthly. If this type of thing doesn't 'float-your-boat' then try some downloadable software to do this, mentioned above.
Just to add regarding response-o-matic, you just fill out one of their forms, to build your own forms - simple! You add your own fields etc, and once you've finished you get code to copy and paste, and your away! You can manage your submissions from their online login, or choose to have submissions e-mailed to your address - or both!
Hope this was some help and not completely pointless.