bellathemes

WP Htaccess File Editor provides a simple, safe and fast way to edit the WordPress site’s .htaccess file from admin panel. It automatically creates backups every time you make a change to the htaccess file. Backups can be restored directly from the plugin, or via FTP.
Access WP Htaccess File Editor via the “Htaccess” menu in WP admin.
AUTOMATIC BACKUPS AND RESTORE
WP Htaccess File Editor makes automatic backups of htaccess file every time you make a change to it. You can restore backup just by clicking ‘Restore Backup’ button. Backups are located in /wp-content/ folder so you can easily find the htaccess backup and restore it manually.

WP Htaccess File Editor

Safe & simple WordPress htaccess file editor with automatic backup.

Niteo

Spider Blocker blocks most common bots that consume bandwidth and slow down your blog. 
It accomplishes this by using .htaccess file to minimize impact on your website. It’s hidden from external scanners.
Spider Blocker is specifically designed for Apache servers with mod_rewrite enabled, allowing you to effortlessly safeguard your website from the most prevalent bots that hamper performance and drain resources.
<h4>Plugin Features</h4>
<ul>
<li>Block Unlimited bots from viewing your site</li>
<li>Easy Export/Import rules (comes with most common list of bots)</li>
<li>Zero Footprint</li>
</ul>

Spider Blocker

Does what it promises to do. No more bad bots to my WP blog :)

Perfect!

SpiderBlocker will block most common bots that consume bandwidth and slow down your blog.

WP Htaccess File Editor vs Spider Blocker