Header and Footer Scripts plugin allows you to add scripts to WordPress site's and just before closing tag.
Maintained alternatives you can try now
Active on WordPress.org, updated in the last 18 months, and doing the same job. Each one opens in a live sandbox.
Adds a custom set of <meta> tags to the <head> section of all posts & pages.
About Easy WP Meta Description
This plugin allows you to add separate meta descriptions for each post, page, front page, or custom post type. These descriptions are added as meta information in the HTML head. You can also add meta descriptions to categories, tags, and custom taxonomies.Changelog
1.1 Character count function added
1.2 Field for edit Front page meta description has been added.
Uninstall script added which deletes all changes in database
1.2.1 Character count function added to front page form field
1.2.2 Plugin and author url changed
1.2.3 Meta description disabled when pagination to avoid duplicate meta description
1.2.4 Improved handling of javascript
1.2.4.1 Bugfix
1.2.4.2 Bugfix
1.2.5 Changed priority in wp_head to make the meta description come closer to title in source code
1.2.6 Added functions for escaping output
