This paper presents two developer tools created that support the process of development of accessible applications. These tools were created within AEGIS Project. The first tool is targeted to developers not experienced in the field of accessibility and helps them with orientation in the variety of user disabilities. It makes easier the process of prioritization of existing accessibility guidelines in a way that suits the given target group and the application developed. The second tool provides direct support for accessible rich internet applications (ARIA) development. It is a plugin for NetBeans IDE and it offers palettes of accessible UI components that can be used to build the accessible application.