Nokia has released NFC Writer for Nokia Lumia WP8 devices. NFC Writer is an application, exclusively for Nokia Lumia users , which allows you to read or create any NFC tags.
You can create them to run applications, for check-in at places, update your status, or just to make calls or send text messages, all in accordance with the instructions that will be included at the time of the creation of NFC tags.
Once a tag has been created just touch it with your phone to perform actions that are stored in it. The tags created by using your Windows Phone can be read by any device with an NFC chip.
On the web there are various websites that sell NFC tags, such as the ones you find inhere.