I'm using a theme called Sticko and I wanted to quickly create a sitemap. There are many free services out there, but I tried XML Sitemaps and they are only limited to 500 links.
Since I'm comfortable with Ruby, here's my simple script to create a sitemap for my blog:
See it here too: https://gist.github.com/maricris-sn/9002865
You can try it and adjust some of the parsing parts. I hope it works for you too.