Punjabi

Advanced Center for Technical Development of Punjabi Language, Literature & Culture (ACTDPL)
Aims at conducting research and development in linguistic and computational aspects of the Punjabi language as well as spreading the usage of Punjabi on computers and the Internet; sponsored by the Punjabi University, Patiala.

Kwintissential
Historical information about Punjabi and its many dialects.

Omniglot
Information about the language, the Gurmukhi script (alphabet) and its features, numerals, audio recordings, and links to much more information.

Raj Karega Khalsa Network
19 Punjabi lessons, vocabulary section, and index.

Wikipedia
Article on the Punjabi language. Article on the Gurmukhī script. Article on the Shahmukhi script.

YouTube
User Hardeep Singh offers 1–5 minute tutorials on Punjabi vocabulary, numbers, and phrases.