Facebook.com - A social utility that connects people with friends, colleagues, etc.
Twitter.com - A free social messaging utility for staying connected in real-time.

 Personally, I only use WordPress, Facebook & Twitter. Was never a fan of MySpace.

1. WordPress.com - Blogs managed by the developers of WordPress.
2. Blogger.com - Blogging tool from Google for easily sharing your thoughts.
3. Windows Live Spaces - Blogging with your Windows Live (Hotmail/MSN) account.
4. Yahoo Profiles (formerly Yahoo 360) - Part of your Yahoo account.
5. LiveJournal.com - Once, one of the most well known of the blogging hosts.
6. Thoughts.com – Share your thoughts with family, friends and our members.
7. Blogr.com - Allows you to blog, host photos & videos, and podcasts.
8. Tumblr.com - A blog platform with a focus on allowing media-rich posts.
9. Bravenet.com - Blog hosting with RSS feeds and more.
10. Squarespace.com - Lets you build your blog with numerous themes.
11. ShoutPost.com - A platform for creating blogs with a focus on generating traffic.
12. Picso.com – Create your own microsite with drag’n'drop utilities
13. Aeonity.com - Blog hosting community.
14. Blog.ca - Made by you.
15. Blog.com - Blog hosting with unlimited bandwidth for their free package.
16. Blogabond.com - A site dedicated to travel blogs with map integration and more.
17. BlogCheese.com - A video blogging website.
18. Blogetery.com - Offers multiple templates, anti-spam, free sub-domain and more.
19. Blogsome.com - Based out of Ireland, this site uses the WordPress MU platform.
20. Edublogs.com - WordPress powered blogging for educators.
21. BlogSpirit.com - European based blogging site, offers 30-day trial.
22. Blogster.com - Offers free image hosting in addition to free blogs.
23. BlogYx.com - Blogging site with extras such as chat boxes so you can interact online.
24. Bloki.com - Lets you build a blog site and even open it up for collaboration.
25. BusyThumbs.com - A blog site for your text messages and camera phone images.
26. ClearBlogs.com - Blog hosting and offers friends only posts, IP-Banning and more.
27. Freevlog - Designed for video blogging.
28. GreatestJournal.com - Based on the same software as LiveJournal.
29. JorunalFen.net - Very much directed towards various “fandoms”.
30. LivePodium.com – Where blog readers speak their mind.
31. Multiply.com - Mixes blogging and social networking, with photo galleries and more.
32. Netcipia.com - Free blog/wiki for private/public display with 2GB storage.
33. One.com -  3 Click blog with one years free hosting.
34. OpenDiary.com - Offers unlimited storage and posts, low cost subscription rates.
35. Over-Blog.com - is a free blog platform to post text, photos, video and music.
36. SocialGo.com - Create an entire online community around your blog.
37. SoulCast.com - Want to blog anonymously?
38. Tblog.com - Blog without the restraints of un-flexible templates and klunky software.
39. Terapad.com - Offers blogs as well as features such as an integrated store.
40. Travelpod.com- Preserve & share your travel memories with a FREE travel blog.
41. Triond.com -  Gain recognition for your writing and earn monthly revenues.
42. Trippert.com - Create and share blogs of your travels.
43. MyEWeb.com - Making it easy for anyone to publish online.
44. Vox.com - Part of the SixApart family of blogging sites, geared towards personal journals.
45. Weebly.com - Allows you to create a site and blog, change designs on the fly.
46. WordCountJournal.com - Write one word on the first day, two words on the second day…
47. Wordmess.net - Upload pictures, videos and documents, supports Google AdSense
48. Xanco.com - Blogging site for you to share all your mobile communications.
49. Xanga.com - Part social network, part blogging, all free.
50. Zoomshare.com - Blog hosting with 250MB of free storage.

Source: Adapted from a MASHABLE list published in 2007. All dead links have been removed and I’v added some new ones. More coming soon.

Feel free to add some more to the list!

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