Tweetmeme-The tweet aggregator

Tweetmeme has several uses.  You can retweet the most popular tweets, find content, and post content.  How do you post?  Add a button to your site.  Users can comment on stories, tweet story comments, and promote your own original content. 

Twtpoll-Do you wanna take a survey?

I got thrown back to my college years when I first saw this site.  I remember surveying people in person and hating it because of shyness.  Now, I can ask unlimited questions, get 400 responses, get Twitter and Facebook comments and embed a widget on my blog, all for free.  I'm a huge fan of the free and as a casual user, Twtpoll is a great tool.  Even if I were someone who needed more features, a one time fee of $89 max for polls and $249 max for surveys isn't bad. Add branding with your personal Twitter handle and this site is golden. Did I mention it's a one-time fee...FOREVER.  For agencies who manage multiple accounts, $79- $129/month isn't bad.

Twellow-A directory of Twitter profiles

Just got done searching and getting to know Twellow, a Twitter Directory.  It's free to register and you can claim your Twitter profile.  It's great to find people to follow in categories that interest you.  If you're a jobseeker, you can follow companies, consultants, and nonprofits.  If you're a nonprofit, you can get listed in activism, volunteer and other categories.  Looking for venture capital?  Follow some VCs. Find out who's in your Twellohood (people who tweet who are geographically near you).

Twibbon

There's something about a social enterprise that features causes on Twitter and Facebook that makes my heart smile.  Twibbon allows individuals, businesses and nonprofit organizations raise awareness for causes that are close to them.  The Twibbon weaves together a community of people using social media.  You can also raise awareness about political issues, brands, entertainment, etc.  There are 5 categories from which users can choose. I like that I can upload an image for my Twibbon or use one from Google (you have to try it out).  I can also edit the campaign and for $99 I can customize it.  For as low as $19.99, I can get it featured to where 15,000 people will see it (they have packages). If I were using this site for a nonprofit, a customized campaign may be worth it, but I'd probably use Salesforce Foundation's software to let current supporters know to support us here too. 

Twitalyzer

What can I say about Twitalyzer? It's an amazing site.  You can find out your Twitter impact or the impact of your favorite users.  Your clout, lists, followers, followings, signal, generosity, velocity, engagement, influence and impact are all analyzed.  For a complete list of how they score a user, along with an explanation, click here.  Plus, they have a discount program for nonprofits if you want to use one of their paid plans.  The average user doesn't need a paid plan though.