While still in its infancy, the Windows Store has already amassed over 20,000 applications from developers for new Windows 8 apps. Programmers and marketers alike have been quick to adapt existing applications and create new utilities and games to take advantage of the new interface of the latest Windows operating system.

While some of the major social services like Twitter, Facebook and Foursquare haven’t announced support for Windows 8 just yet, social media apps are starting to pop up. Here are a few killer social media apps to add to your Windows 8 device.

1. FlipToast

One of the first social apps available for Windows 8, FlipToast aggregates content from your Facebook, Twitter, LinkedIn and Instagram feeds with the style that mirrors the Windows 8 visual theme. The app makes it easy to stay on top of your entire social graph and you can quickly engage with friends by liking and commenting on posts from across networks. FlipToast also integrates with your address book to send you birthday reminders for your friends, search for friends from all networks and share content right from your desktop.

2. Tumbukun

If you’re a fan of Tumblr, then Tumbukun is the app for you. This app lets you explore the entire Tumblr universe right from your desktop. With full support for multiple blogs and tag tracking, it’s easy to use Tumbukun to discover new content and then share it with friends. You can follow, like and reblog any blog or post and share posts to or from other Windows 8 apps.

3. Social Dribble

If you are looking for a more passive way to discover content on Twitter, you might try Social Dribble. The app displays a single tweet at a time in an attractive full-screen view designed for maximum readability. You can choose to have the app display a single tweet at a time from your timeline, or track a specific user or hashtag. If you want to keep an eye on tweets while you work, Social Dribble can “snap” to the side of your screen to provide an unobtrusive look at Twitter while you accomplish other tasks.

4. Ferret

If you’ve decided to pay the monthly fee for a subscription to App.net, Ferret could be your new favorite Windows 8 application. Ferret takes the entire experience of the app.net website and customizes it to make use of the sharing features available in Windows 8.

You can post, repost, reply and star posts, as well as view multiple streams, user profiles, and follower lists. You can also attach media from your desktop. If you have multiple App.net accounts, Ferret allows for user switching and offers a host of advanced features such as filtering, post exclusion, muting, and live streaming.

5. Instametrogram

This app might have a complicated name but it has a simple concept. Instametrogram is a free application to view photos on Instagram. You can like and comment on photos, or share them with others. With support for live tiles and desktop notifications, you can keep up to date on new photos as they post. As with most Instagram clients, you can’t post new photos from the app but the developers have made it easy to discover new photos and people, save photos to your desktop, and comment quickly and easily.

6. ReddHub

Longtime users of Reddit will feel right at home with ReddHub, a popular Windows 8 app designed to take the website’s entire experience to the desktop. Described as “feature rich, stable and elegant,” ReddHub brings a modern look and feel to a social network that has been around for quite a while.

The app makes it simple to post new content, share content from others,  and reply with comments. It supports all the social features that come with an account. You can vote, save, report and pin content to your desktop as a live tile. With infinite scrolling and in-line images and video and audio support, ReddHub is often described as one of the most feature-rich apps available for Windows 8.

7. StumbleUpon

If you’ve never used StumbleUpon, its new Windows 8 app provides a lot of incentive to start. After setting up your account and selecting from a list of over 500 interests, StumbleUpon will show you cool articles, content and treasures from every corner of the Internet. Integrated with the native Windows 8 sharing support, it is simple to turn content discovery into content sharing. Designed to provide an immersive full screen experience, the app can also be “snapped” to the side of your desktop to keep you entertained while you get stuff done.

8. IM+

It seems like every social media application and network out there comes with its own chat service. Between Facebook, Skype, Google Talk, Windows Live, and AIM (just to name a few), having separate apps for each of these can quickly become overwhelming.

With IM+, you’ll only need one app for all your messaging services. With support for text and photo sharing, group threads and multiple accounts, IM+ can show you a unified list of friends from across all your chat networks. You can also keep your friends updated with status messages, typing notifications and moods.

9. News Republic

One of the biggest advantages of social media is the ability to stay in the know about breaking news from around the world. A popular news aggregator, the News Republic app features content from a huge list of sources and gives you access to over 10,000 breaking news stories every day.

Because this app doesn’t rely on just RSS feeds, you’ll get rich articles with images and video right from within the app. Deeply integrated with the Windows 8 social sharing features, you can post news you find on any number of social networks or send them to friends and family.

While there is some concern that Windows 8 is lacking in social apps, many developers have already started to embrace the new operating system and are working hard to provide native Windows 8 experiences for their customers.

Do you have a killer app for Windows 8 that we missed? Let us know in the comments!

[Image credit: DellPhotos]