tweaked .htaccess for automatically removing (and redirecting) URLs with trailing slashes with Statamic (http://statamic.com).

statamic_remove_slashes.htaccess

RewriteEngine On

RewriteRule ^(_app) - [F,L]
RewriteRule ^(_config) - [F,L]
RewriteRule ^(_content) - [F,L]
RewriteRule ^(.*).yml$ - [F,L]
RewriteRule ^(.*).yaml$ - [F,L]
RewriteRule ^(.*).html$ - [F,L]
RewriteRule ^(.*/)?\.git+ - [F,L]

# remove trailing slash from URLs
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} (.*)$
RewriteRule ^(.+)/$ http://%{HTTP_HOST}/$1 [R=301,L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php [QSA,L]