Calameo is a public profile site: you create an account and point it at your website URL.
Free directories that still accept submissions
No listing fee recorded for a typical submission. They can still reject the URL.
1263 destinations
Caranddriver is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Care2 is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Careerealism is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Carousell is a classifieds board: you post an ad and include your website URL.
Catster is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Chamberofcommerce is a public directory that still takes your website URL.
Change is a public profile site: you create an account and point it at your website URL.
Cinemablend is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Cio is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Citeulike is a social bookmark: you save your page on a public list.
City Data is a forum. The usual path is a profile or signature that points to your site.
Citysearch is a public directory that still takes your website URL.
Classifiedads is a classifieds board: you post an ad and include your website URL.
Classifieds is a classifieds board: you post an ad and include your website URL.
Classpros is a classifieds board: you post an ad and include your website URL.
Click is a classifieds board: you post an ad and include your website URL.
Clicknmark is a social bookmark: you save your page on a public list.
Clipix is a social bookmark: you save your page on a public list.
Cntraveler is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
Codecademy is a forum. The usual path is a profile or signature that points to your site.
Codeproject is a forum. The usual path is a profile or signature that points to your site.
Codrops is a publication. A guest article or an accepted pitch is the usual way for your site to show up.
500px Community is a forum. The usual path is a profile or signature that points to your site.
What a free listing means here
Free is the cost of the door, not a promise of a link. Some free directories are slow, nofollow, or closed to thin sites. Read their rules first.