The ACCESSIBLE project aimed to develop tools to assess and improve the accessibility of web applications, mobile applications, and description languages. It sought to create an assessment simulation module, harmonized accessibility methodology, developer aids, and an ontology knowledge base. The project targeted software developers, policy makers, service providers, and users with disabilities. It proposed applying its tools to mobile web applications, web services, e-commerce sites, and description languages. Key components included disability simulators, standards compliance checking, and recommendations for more accessible design. Public results were made available on the project website.