OSD Blog Search Widget can be placed in any area on your site that your theme allows. It provides a search box that will only display results from searching your blog posts. It excludes any other post type including Page and custom post types. It is light weight and works fine in conjunction with your current site search form. Now includes a shortcode with two optional attributes - EX [osd_blog_search placeholder='search terms' class='test classes']
Translations:
Serbian, by Ogi Djuraskovic (
http://firstsiteguide.com/)