Sabre is the acronym for Simple Anti Bot Registration Engine.
Sabre is dedicated to the protection of your blog against unwanted registration by spam robots when you give your readers the possibility to register freely.
This brand new 1.0 version is compatible with WordPress 2.9.1 but is also be packed with great new features like:
- Non graphical test added to the existing captcha and math tests.
- Custom name and Email for the sender of the registration mails.
- Enhanced Invitation codes management with automatic code generation and limited time and number of use of the codes.
You can have more informations and download it on WordPress.org at http://wordpress.org/extend/plugins/sabre/.