Reading
Dictionary/Flashcards
Yellowbridge (dictionary, etymology, flashcards)
The Classical Chinese Dictionary (文言文字典）
Anki (flashcards)
Pleco (dictionary app with flashcards)
Lexicool (Chinese > English translation dictionary)
Videos/Movies/Television
PPTV*
*-limited content from outside of mainland China
Podcasts/Video Lessons
Mobile Apps
Hanping (Dictionary)
Pleco (Dictionary)
海词-Dict.cn (Dictionary)
网易-NetEase (News)
新浪新闻- Sina (News)
Tunein (live radio)
Cbox (live television, movies, etc…)
Skritter (character practice)
Hanzicraft (character practice)
Chinese Writer (stroke order practice)
Google IME (Chinese writing input for Android)
Hanzireader (reading annotator-iOS only)
Chinese Word Puzzle HD (crossword game)
Miscellaneous
Tunein (live radio)
凤凰FM (radio, audiobooks)
Justing (audiobooks)
Sharedtalk (language exchange, chat)
Italki (language exchange, chat, online tutoring)
Lang-8 (language exchange, writing practice/editing)
Mandarin Spot (reading annotator)
Marco Polo Project (translation club)
Ninchanese.com (language learning software, multiplayer Chinese vocabulary games)
The Washington Chinese Language Meetup Group
Learn Chinese ABC (pronunciation)
Praat (tones/pronunciation, voice recording software)
Audacity (tones/pronunciation, voice recording software)
Blogs/Newsletters
Sinocism (News/Policy in English and Chinese)
Hacking Chinese (Language learning, acquisition, maintenance)