It validates your data and helps secure your code. Agavi can validate input submitted by the user, filter and normalize values, and make your application totally bullet-proof by only exposing validated data to your code, greatly lowering the risks of you or one of your developers using potentially unsafe data in your code. This applies to any potentially unsafe input, not just GET or POST data - files, cookies, and HTTP headers, among other input sources, will all be run through the validation system, and the single point of access to such data guarantees that you really only process data you have validated.

It takes the pain out of HTML forms. Agavi features a very clever approach to handling forms for you that does not rely on helpers or a specific template language to work. Not only will it re-populate the information the user entered when a form is shown again after submission, it also assigns classes to erroneous fields and their labels, and can even insert error messages into your form without any placeholders in the markup. Of course, you have full control over all aspects at any time, allowing you to pre-populate forms with information from your database or other sources.

It offers powerful features for globalization. Besides support for translating strings in different languages, Agavi comes with the ability to format and parse numbers, dates and currencies in over 250 different locales. It is aware of time zones, has extensive support for calendars and calendar operations, can give you a list of country names in the language (and script!) you like, and much, much more.