Telerik's TileList control satisfies the requirements of Section 508 and those for Level A according to the W3C Web Content Accessibility Guidelines (WCAG) 2.0.
RadTileList is tested with the WAVE and Compliance Sheriff automated tools.
By itself, RadTileList generates as little markup as possible. When creating content, the developer should make sure that content is accessible to persons with disabilities. This is most important for Live Tiles, ContentTemplate Tiles and the PeekTemplate where the entire content is designed by the developer.