RewriteEngine on
RewriteBase /

# Empty URL path => index.html
RewriteRule ^/$ index.html [L]

# Check to make sure we aren't dealing with any JS, Images, CSS, Flash objects
RewriteCond %{REQUEST_URI} !\.(js|ico|gif|jpg|png|css|swf|html|htm)$ [NC]
# Route /anything -> anything.html
RewriteRule (.*) $1.html