In the age of the Internet and the iPhone, it's probably becoming more and more acceptable to send digital greeting cards through email, text, or Facebook. Unlike the traditional paper format, digital cards can be customized using a wide range of templates and themes.

The iOS App Store has a pretty good set of free or inexpensive greeting card apps containing fresh, modern designs that fit the tastes of different types of users. Let's check out five of them.

justWink

Browsing the greeting card designs in justWink is like walking into the Hallmark section of a department store. This free app features a nice selection of greeting cards including birthday, wedding, friendships, "bromance" and everything in between.

You can customize the messages of each flash-based card, and send them via email, Facebook, text message.

The only caveat is that the card itself is not emailed; it is linked back to your account in an envelope image sent to the recipient.

justWink is set up also for you to order actual physical cards and send by snail mail, or to pick them at one of their local stores. Nevertheless, the stylish design and the ease of personalization might prove more thoughtful than picking out a generic greeting card in the store. justWink is well worth the free download.

Red Stamp

Red Stamp is similar to justWink, but this app allows you to actually send personalized digital cards via email, text, post, as well as paper cards through mail.

Red Stamp contains very stylish, modern designs, with a large assortment of over 400 greeting and holiday cards, invitations, and personalized stationery. Many card templates allow you to add a custom photo or two right from your iPhone Photo Library or snap one on the spot.

Red Stamp has been featured in several top media shows and publications, including O Magazine and InSyle. Even the premium paper cards are reasonably priced and are worth checking out.

FREE Email Backgrounds

For more simple straight forward email greeting cards, Email Backgrounds provides a large set of cute themes and backgrounds to choose from.

The category of cards include animals, birthday, Mother's Day and other holidays, nature, Thank You cards. However, it's a little cumbersome to layout a card, for you have to type and load your message, and then select your theme to add the message. So be prepared to spend a few minutes figuring out this app. The slight complexity of the app does however allow you to retain your messages and customize the font style and size to the text.

Cartolina

The eye catching vintage designs of Cartolina Cards ($2.99) will not fit everyone's tastes, but this app has personality and is a fashionable alternative to plain email or text message.

Some customers have complained about the limitation of themes and the amount of text you can add to a card, but if you like the designs it may be worth the price.

Build-a-Card: Mother Edition

The Build-a-Card: Mothers edition ($0.99) for the iPhone is limited to only a handful of templates, but it's a straight forward, hassle free, customized digital card creation app.

You can add a photo from the camera roll or photo album of your iPhone, or from your Facebook album, type out a message, and then send your card via email, Twitter, or Facebook. Very easy.

Let us know about digital card apps you use.