Dictionaries, Encyclopedias & Digital Libraries

• Kapruka
  English-Sinhala one-way dictionary with corresponding sound files

Grammar

• Sinhala Basic Course Vol. 1, 2, and 3 (pdf)
  Sinhala writing and grammar in 3 volumes
• Peace Corps Sinhala Language Trainer's Manual (pdf)
• Sidath sangarawa
  Free Google book explaining Sinhalese grammar

Vocabulary

• Mylanguages.org - Sinhala
  Free vocabulary lessons by topic or word category

Reading & Writing

• Omniglot
  Introduction to the Sinhala script

Listening & Speaking

• The South Asian Literary Recording Project
  Audio recordings of Sri Lankan authors reading selections of their work

Online Course Materials

• Sinhala
  Free online lessons for beginners
• Foreign Service Institute Sinhala Basic Course
  Links to downloadable texts

News & Media

• Lankadeepa
  Newspaper in Sinhala
• BBC Sinhala
  News from Sri Lanka

Arts, Films, & Music

• InfoLanka
  Extensive reference list of websites related to Sinhalese culture