Subhransu Sekhar

When you login to wordpress site it saves the auth info in cookies which have a expire time of 2 days. If some body get access of your cookie he can get into your wordpress iste. Use this plugin to increase the security by adding some random variable in the cookie for validation.

Safe Cookies

Secure your wordpress site by making the Auth Cookie more secure

curlybracket

This plugin creates a widget which will show the title, thumbnail and link to the last 5 posts a user has consulted. 
To store the data it uses sessions.
Session handling is provided by slightly modified functions from the simple-session-plugin by pkwooster.

Last Seen Posts Widget

Show title and links to the last 5 posts a user has consulted.

Safe Cookies vs Last Seen Posts Widget