hnGuestbook is a simple guestbook that uses a flat file to store the messages. That means that no SQL database is required. The guestbook uses AJAX technology, so you could view the pages, and sign the guestbook without reloading the whole page. Some of the features are a bad words filter, spam protection, and a simple admin panel to manage the messages.
AJAX technology Flat file database Flood protection Spam bots protection without using captcha Simple, Fast, and Free View Demo
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