github.com/erinata/SublimeMarkdown
This plugin is somewhat a Markdown typing helper. It automatically add the * or - when you are typing bullet points. And it adds > for multiline blockquotes.
Press Ctrl+B to build the markdown into html and view it in browser. I do not know how to run a sublime text plugin in build system (And I asked in technical support no one answer). Therefore I bind the key Ctrl+B to the command when you are at a markdown file. Probably you need to disable other markdown build systems to get this to work.
For the tmlanguage file, I just copy from the textmate bundle for me own convenience.
This is the first time I wrote a Sublime Plugin and I have never wrote any Python before. The are probably many better way to do this but I think at least it works.
Also, how to make the plugin available at package manager?