Free Sites to Promote Free eBooks

Here is a list of web sites where you don't have to pay to promote your free eBook. 
As a self-published author, I appreciate FREE opportunities for promotion. 

http://www.ereaderperks.com/authors/

http://freebooksy.com/editorial-submissions

http://addictedtoebooks.com/submission  
http://awesomegang.com/submit-your-book/
http://bookdealhunter.com/submit-free-book
http://bookgoodies.com/submit-your-free-kindle-days/
http://bookloversheaven.com/author-information-form/
http://freedigitalreads.com/author-submissions/
http://indiebookoftheday.com/authors/free-on-kindle-listing/
http://www.armadilloebooks.com/submit-free-ebooks/
http://www.frugal-freebies.com/p/submit-freebie.html
http://www.theereadercafe.com/p/authors.html
https://www.facebook.com/ebooksfreefreefree
https://www.facebook.com/EreadingTday 


Please leave a comment if you know of other sites. 
Disclaimers: 
1) You must register for most sites and accept their newsletters. Check for their specific instructions and requirements.
2) The sites may change or start to charge a fee.
3) I don't know if using the sites helps sell books.