Here i have collected 6 free Christmas social networking & RSS icon sets.

1. Christmas Special – Free Social Networking Icons

2. PSDFAN Exclusive Christmas Icon Set

3. Christmas Social Bookmark

4. Winter Holiday RSS Icons

5. Early Christmas Social Networking Icons

6. Free Social Media Icons for Christmas

I tried to compile a list of more than 35 plugins that will let you make your WordPress blog more social. I suggest you do not install all of them just choose one which you like the most or think is the best.

1. Sociable

Sociable is a plugin which adds social media buttons to your posts, and does so easily, and beautifully.
Download

2. Bookmark Me

Bookmark me is a WordPress plugin made to add the “social bookmark buttons” on each post. It is different to other social bookmarks plugins because it’s focused on collecting non-english bookmarks site.
Download

3. Bookmarkify

The Social Media Marketing Plugin that lets you put social bookmarking links in your posts and other pages. Help your readers promote your blog and watch your traffic grow!
Download

4. ShareThis

This is very widely used plugin.
Download

5. PingPressFM

PingPressFM is a WordPress plugin which submits your posts to Ping.fm. A service which can update more than 30 snetworks from one source.
Download

6. obsocialbookmarker

obsocialbookmarker is a social bookmarking plugin which adds user-submission links at the bottom of each post for various social bookmarking sites.
Download

7. iBegin Share

iBegin Share is the 100% open source solution that makes sharing and spreading your content easier than ever, all while giving you complete control.
Download

8. I Love Social Bookmarking

I Love Social Bookmarking is a simple WordPress plugin that allows your readers to submit your content to social media services via a clutter-free drop-down list of attractive icons.
Download

9. Social Bookmarking RELOADED

The Social Bookmarking RELOADED plugin for WordPress adds a list of XHTML compliant graphic links at the end of your posts and/or pages that allow your visitors to easily submit them in a number of social bookmarking sites.
Download

10. Social Bookmarks

Gives you 50 social bookmarking submission icons to choose from including all of the major bookmarking services and lots of smaller ones.
Download

11. Social Dropdown

This plugin displays several social bookmarking options in a dropdown. Unlike other social bookmarking displays, this does not cause clutter and takes up little screen space.
Download

12. SociBook

A really simple plugin that will add bookmark links of Del.icio.us, Digg it, Slashdot, RawSugar, Yahoo! MyWeb, and many other links to your wordpress. You can decide which bookmark services you want to show and in what order. You also can define, a own iconset.
Download

13. SocioFluid

SocioFluid adds to your wordpress posts the buttons to the major bookmarking sites.
I am using this plugin on this blog. As i like its look and big icons display.
Download

14. WP PunchCard

WP PunchCard is a WordPress plugin for installing PunchCard into WordPress with extreme simplicity.
Download

15. ComplexLife

This is a lifestreaming WP plugin.
Download

16. Follow Me

The Follow Me widget allows you to display links to all your social media profiles in one, easy-to-access button or window.
Download

17. LifeStream

Lifestream displays your social feeds and photos much like you would see it on many of the social networking sites.
Download

18. Meet Your Commenters

When someone comments on your blog and writes a comment with his/her URL, is leaving more information than you think. This wordpress plugin displays web pages and profiles of those users in the dashboard, so you can add them as friends if you are in the same social network
Download

19. Retaggr

Using this plugin you can make your virtual business card which links to your social networking profiles.
Download

20. SezWho

Using this plugin you can make your virtual business card which links to your social networking profiles.
Download

21. Social Homes

A WordPress plug-in which adds a sidebar widget containing a subtle list of all your social homes as linked favicons.
Download

22. Digg Digg

Digg Digg is a social vote button wordpress plugin, which including Digg, Reddit, Dzone and Yahoo Buzz buttons wordpress content integration.
Download

23. Digg This

Digg this wordpress plugin is a plugin that detects incoming links from Digg.com to your wordpress post and automatically display a link back to the digg post, for people to digg your story.
Download

24. DiggZ-Et

It automatically displays a “digg” button for each post/page.
Download

25. Dugg Widget

Displays your past 10 dugg stories and make it a widget.
Download

26. FriendFeed Activity Widget

The FriendFeed Activity Widget is a simple WordPress widget plugin that pulls your FriendFeed stream, pretties it up a bit and shares it with visitors to your blog. It’s essentially a lifestream plugin that requires just a few steps to set up.
Download

27. FriendFeed Comments WordPress Plugin

This plugin will allow you to display on your own site the comments that people make on FriendFeed about your post.
Download

28. Stumble Reviews

Allows you to add the reviews that appear on StumbleUpon (StumbleUpon reviews) for a given page to be displayed on that page.
Download

29. Twitter Updater

The Twitter Updater automatically sends a Twitter status update to your Twitter account when you create, publish, or edit your WordPress post.
Download

30. WordPress Twitter Widget

Twitter Widget Pro properly handles twitter feeds, including @username and link parsing, feeds that include friends or just one user, and can even display profile images for the users.
Download

31. WP-Profilactic

The WP-Profilactic Plugin publishes your LifeStream or informs readers where to find you online by parseing your aggregated online activity feed from Profilactic.
Download

32. Hocus Pocus Buttons

Hocus Pocus Buttons is a WordPress-Plugin that provides sidebar widget with a widerange set of buttons for social bookmarking websites.
Download

33. KnxDT Bookmarks

With this plugin you can send and share your favorites posts (your readers can do this too) to popular social bookmarking services like Digg, Meneame, Delicious, Technorati, Yahoo, Google.
Download

34. Gregarious

The Gregarious plugin supersedes the Digg This Reloaded Plugin and allows for seamless integration between your WordPress Blog and social bookmarking sites such as Digg.com, Del.icio.us, Reddit and more.
Download

35. Hey Social

Hey Social is the coolest way to interact with the visitors of your blog,
Download

If you are already using anyone of above do comment about its usability and function.