Ryukyuan (Okinawan) Dictionaries
Dialect Dictionaries / 方言辞典 (including Okinawan dialects)
Accent (Pronunciation) Dictionaries / アクセント (発音) 辞典
In 2006 Okinawa Prefectural Government proclaimed September 18 as "Island languages Day" (Shimakutuba no hi / しまくとぅばの日).
Okinawa Prefectural Government has a list of websites that promotes the use of Uchinaaguchi or Shimakutuba, Okinawan languages.
Research published by the Agency of Cultural Affairs (文化庁) in Japan
Research by NINJL
Articles by Researchers
Aloha Uchinaaguchi Channel on Youtube
There are 15 videos created by Aloha Uchinaaguchi and you are able to learn basic conversation in Uchinaaguchi.
Uchina De Asobo / うちなーであそぼ is a five-minute TV program broadcasted by NHK Okinawa. (JPN version)
As of April 22, 2017, some of the contents created and maintained by NHK are no longer availalbe on their site. For excample, the page that used to have a story titld "Usagi to kame (The tortoise and the hare)" is no longer available at http://www.nhk.or.jp/okinawa/asobo/archives/125.html.