The menu is fully keyboard accessible and contrast levels for text are kept well above the 4.5:1. This theme passes WCAG 2.0 AA standards out-of-box. On, Period is given the “accessibility-ready” tag. This is basically a reminder to users that while all design elements in Period pass accessibility standards, it’s up to the user to make sure their content is accessible too in order for their site to maintain its accessibility.
Is your website accessible to ALL users? The Americans with Disabilities Act (ADA) of 1990 prohibits discrimination based on disability. Legal precedent has now evolved to include new forms of technology and communication under the act – like websites. ADA compliance for websites will be federally regulated come 2018! Find out more about the new ruling and what you could be doing to prep your website for these accessibility requirements.
Although the plugin works, we activated the white label solution. They said: For only $10 you can modify the widget footer, remove the donate link and enable other customizations From then and on they charge me every single month 10$, they don't reply to my messages and the so called "Manage" menu has been disappeared from the widget... BE AWARE! I'm still trying to resolve this....
You probably won't have to check your site with all of the available evaluation tools out there, but it is a good idea to do so for the most common web browsers. Just as accessibility software makes it easier for people with disabilities to navigate the Internet, these tools make it easier for developers to ensure accessibility from the start. When you think you've mastered it, go back through the Section 508 compliance checklist to ensure you've met every goal.

The Department of Justice may file lawsuits in federal court to enforce the ADA Compliance, and courts may order compensatory damages and back pay to remedy discrimination if the Department prevails. Under title III, the Department of Justice may also obtain civil penalties of up to $55,000 for the first violation and $110,000 for any subsequent violation of ADA Compliance.

The ADA requires that title II entities (State and local governments) and title III entities (businesses and nonprofit organizations that serve the public) communicate effectively with people who have communication disabilities. The goal is to ensure that communication with people with these disabilities is equally effective as communication with people without disabilities.
First, these lawsuits will be very easy for plaintiffs to work up. The plaintiffs do not need any site inspection, experts or research. They can just surf the web from the convenience of their homes or offices. Marty says the "surf by" complaints could dwarf the "drive by" ADA lawsuits that looked for missing accessible parking spaces and other readily visible shortcomings.
@Rick, I didn't specifically look at doctype, but Steve Faulkner did in his original article (see the link at the top of this post). He found that 101 of the 130 pages containing role="main" (78%) used the HTML5 doctype, which of course leaves 22% that didn't. I do recommend using ARIA even if using an earlier doctype. Validation is important, but if validation and accessibility conflict, I think most would agree accessibility should trump validation. Assistive technologies that support ARIA landmarks do so regardless of doctype, and otherwise the presence of these role attributes has no ill effects in any user agent.
In addition, aids and services include a wide variety of technologies including 1) assistive listening systems and devices; 2) open captioning, closed captioning, real-time captioning, and closed caption decoders and devices; 3) telephone handset amplifiers, hearing-aid compatible telephones, text telephones (TTYs) , videophones, captioned telephones, and other voice, text, and video-based telecommunications products; 4) videotext displays; 5) screen reader software, magnification software, and optical readers; 6) video description and secondary auditory programming (SAP) devices that pick up video-described audio feeds for television programs; 7) accessibility features in electronic documents and other electronic and information technology that is accessible (either independently or through assistive technology such as screen readers) .
Accessible design benefits all users and creates market opportunity, Reha said. She continued: “Access to information online is everywhere, so it’s easy to take for granted that it’s available to everyone, but it’s not. Such access is incredibly important for people with disabilities because it lets them become independent and improves their quality of life.”

...the full and equal enjoyment of the goods, services, facilities, or accommodations of any place of "public accommodation" by any person who owns, leases, or operates a place of public accommodation. Public accommodations include most places of lodging (such as inns and hotels), recreation, transportation, education, and dining, along with stores, care providers, and places of public displays.