WordPress.org

CheckBot - simple one-click captcha-plugin created for people. It is very easy to use, and look nice, but at the same time, fully customizable, and quite seriously protect your blog from spam.

Features

• Antispam. The plugin uses javascript and randomly generates identifiers and field names, which allows the plugin to automatically filter out fine sent spam.
• Support languages. The plugin supports Russian and English languages.
• Fully customizable appearance.
• The plugin can be used immediately after installation, without additional configuration.
• You can configure the output plugin yourself anywhere on the page comments.
• If the user is not the correct picture, or even forgot to select it, the plugin will tell him about it, and, just in case it will write a comment.

Author: ref