I did a lot of research on this topic and wrote a blog post with all my free site suggestions. Find it at:

http://www.lengthytravel.com/free-thai-language-learning-resources-and-materials/

These use English as the base language, but they may be helpful:

<em>http://www.thai-language.com/</em>;

<em>http://bonthai.blogspot.com.au/</em>;

<em>http://auathai.com/videos</em>;

http://thai-jpn.com/

http://www.japanese2thai.com/

www.online-thaigo.com/

Their target is Japanese though.

Hajimemachite!
I can help you with pronunciation if you want. I am fluent in English and I am learning Japanese :)