1. http://www.multimedia-english.com/phonetics (a variety of sounds, processes, etc.)
2. https://www.englishclub.com/pronunciation/sentence-stress.htm (for rhythm and stress)
3. http://www.teachingenglish.org.uk/article/phonemic-chart (for reference)
4. http://soundsofspeech.uiowa.edu/english/english.html (American English)
5. http://www.bbc.co.uk/learningenglish/english/features/pronunciation (highly recommended)
6. http://www.macmillaneducationapps.com/soundspron/ (pronunciation app).
7. http://www.elementalenglish.com/category/2b-pronunciation/ (videos on a variety of pronunciation topics).