Jess

A simple plugin that allows you to restrict access to certain pages on your website to only logged in users quickly and easily. This plugin can be useful to those who do not need overly complicated membership systems, and to those who want to password protect a group of pages but don’t want to password protect each page individually, forcing the users to log into each one.
It is simple to use. First select whether you want to password protect all pages by default, and want to choose which pages are public. Or choose to allow all pages to be public by default, and choose which pages are password protected.
When non-logged in users try to access a password protected page they will be redirected to the WordPress login screen. Once logged in, they will be redirected back to the requested page and will not be asked to log in again on subsequent pages.

Password Protect Pages

Restrict access to specific pages to only logged in users.

Krešimir Karamazen

iainredmill

This plugin adds an onscreen keyboard powered by Javascript/JQuery, ported from Samuel Deering’s work on github with his permission under the above licence by Iain Redmill, now working within WordPress, allowing mouse based input or input when working from a touch screen device. Keyboard settings etc can be modified by editing the file. To add a keyboard, enter [oskb] within your page where you wish it to appear.
Apart from improving the working of the older version, the on-screen keyboard for password protected posts and pages in different flavors has been added recently. 
Onscreen keyboard for password protected posts and pages. Standard keyboard can still be used. 
Onscreen numerical keyboard for password protected posts and pages where password is numerical i.e. a pincode. Furthermore: 12 digit password is submitted automatically. (Passwords longer than 12 characters, of which the first 12 characters are numbers, are therefore impossible.) Standard keyboard can still be used (but in that case the auto-submit won’t work properly – you have to hit the submit button). General passwords can still be used by using standard keyboard.

Onscreen Keyboard

This plugin adds an onscreen keyboard powered by Javascript/JQuery to your page on demand.

Password Protect Pages vs Onscreen Keyboard