The captcha.php library is very user-friendly and extremely easy to integrate into existing forms, because of its simple API. It nevertheless sports many configuration options, like multiple image modes and accessible alternative text riddles. It also has "AJAX" super cow powers and many sensible defaults to frustrate users less than other implementations. It prevents spambot access well, even with its relaxed defaults.
phpGrid provides professional-looking Ajax-enabled grid-based editing, create, read, update, and delete (CRUD) operations for Web developers in as little as two lines of code. It features cross-browser inline editing, support for all HTML form controls, integrated search toolbar, a master detail data grid, image display, MS Excel and HTML data export, permission control, a theme roller, built-in record sorting by any column, support for major databases including MySQL, SQL Server, and Oracle, support for large database record sets, and WYSIWYG and Ajax file upload.