By 像Adobe和Microsoft的开发工具向来都很贵，后来Microsoft的Visual Studio有免费的Express版，这次Adobe的Flex也有免费版的了，不知道以后Photoshop之类的的会不会也免费？
好了，废话少说，免费版的Flex Builder面向所有的教育届用户开放，需要提供相关证件的照片。可以到这里：http://www.flexregistration.com/，提交您的个人信息及上传证件照片即可。
不想等破解版的都去吧~
Adobe Flex Builder 3 Pro is available for free to all education customers. This includes all students, faculty and staff of eligible education institutions.
Proof of Eligibility
To receive the product, you must upload a valid proof of eligibility to get the serial numbers to activate the product. Valid proofs of eligibility are:
1. a student ID showing current enrollment,
2. a Faculty ID showing current employment
3. an employee ID showing current employment, or
4. a letter on an educational institution letterhead stating that you are either a current student,
a current faculty member or a current employee of the institution.Terms and conditions
The education version is only available to education customers and is not meant for distribution to institutions,
organizations or people outside the authorized educational institution. For additional information on eligibility,
please refer to the FAQ.