An easy to use events plugin, with a calendar widget.

Integrates future-dated posts into your blog. Adds future posts and category selection to Wordpress's built-in calendar widget.

Ultimate Widgets includes several widgets/shortcodes with a style unique covering many different things you may need to add to your website.

Minical is an opensource Property Management System (PMS) and Online Booking System for hotels.

This Booking System offers the 1st booking calendar for Facebook and WordPress, which easily turns visitors on Facebook and your website in clients.

An awesome calendar plugin that just works! Shows the upcoming holidays and/or your own events.

Robo-IT Calendar is very easily used plugin. A full featured super powerful calendar solution for everyone.

This plugin lets you embed 2 different items onto your website: