As an alternative to Hub Pages, I have been using Triond. Triond gives you a payout from the site as well as from Google Adsense. However, the payout tends to be much lower than Hub Pages.
The benefit of using Triond as opposed to Hub Pages is you can write about a topic of your choosing and get it published quickly without a lot of scrutiny. When I write for Hub Pages, I feel as if I must have all my "i's" dotted and my "t's crossed. To date, I have about three times the number of articles on Triond -- than I have on Hub Pages -- simply due to the ease of getting my articles published quickly.
Similar to Hub Pages, your articles earn money for you as long as they are published on Triond and get views. Even though I do not currently write for Hub Pages as often as I used to -- I continue to receive residual money from the articles I've already published -- which is a plus.
If you choose to write for Triond, I recommend you also sign up for Redgage. I republish all of my Triond and Hub Page articles on Redgage. As a side note -- If you want to take a break from writing, photos tend to do well on Redgage.
Another alternative to Hub Pages is Webanswers. When you write for this site, you respond to questions -- similar to the answer section on Hub Pages. The difference is if your answer is chosen or awarded, you receive money from that particular question.
You can also ask questions on Webanswers. Here's a question that I asked similar to yours about where to write online. ( Sorry -- Hub Pages did not allow link -- see what I mean about the ease in publishing what you write at other sites?).
Write for Multiple Writing Sites
If your goal is to make money writing online, your best bet is to write for many different writing websites (including Hub Pages) -- since the payout for writing sites tends to be very low. For example, I currently write for Hub Pages (Not as frequently as Triond), Triond, Webanswers, WordPress.com, InfoBarrel and recently signed up for Sponsored Reviews where you receive pay for reviewing or giving your opinions on products. Of these, Webanswers has the highest payout for me, with Hub Pages coming in second followed by Triond.
As you can see, there are alternatives to Hub Pages, however, if you choose to select any, I recommend you keep your articles on Hub Pages so you can receive residual income even as you write for other sites.