Quite possibly the best contact form for Joomla 1.x-3.x on the market. Whilst the subscription pricing for it seems to be the norm these days, the support you get from Douglas, the owner and lead coder, is extraordinary and well worth the price. Why is it so good? It simply works. It integrates nicely with all the major newsletter sign-up forms, and if you ask for something in particular, Douglas will make it happen. He truly does work to resolve any issues that may arise from the product, or features the product may be lacking. The securimage captcha plugin puts other captcha programs to shame, and it's free with CE. As others have noted, the Component/modules/plugins are worth their weight in gold if you want a reliable way for people to contact you.