ICANN currently accredits domain-name registrars for the following Top Level Domains:

.aero, (reserved for the global aviation community) sponsored by Societe Internationale de Telecommunications Aeronautiques SC (SITA)
.asia, (reserved for the Pan-Asia and Asia Pacific region) sponsored by DotAsia Organisation
.biz, (restricted to businesses), operated by NeuStar, Inc.
.cat, (reserved for [...]