Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
This widget displays text/html OR banners only for specific categories. It is as simple as 1-2-3.
Parses posts for defined glossary terms and adds links to the static glossary page containing the definition and a tooltip with the definition.
Display the gravatars of top commenters for your blog. The gravatars are displayed as widget that can be placed anywhere within your blog.
Protects e-mail addresses from being found by spam spiders (or any other web crawler).
Force all visitors to login before accessing your wordpress site and add a message on the login screen explaining that login is required.