Yext is an online brand management solution that offers updates to your online presence business listings easily. Smaller businesses do not want to pay for their services, as they typically don't stretch the entire Internet landscape. However, Yext offers a free "Business listing scan" to see if your online presence already exists or not and if you have outdated information. Below is the free Yext business listing discovery index. From here, you can signup to these sites and update or claim your business listing for free, in most cases.
Note: Some of the listings below are one in the same, meaning updates to one listing impacts the other accordingly.