Where should you submit your iPhone application? The iTunes App Store, of course! But, iTunes isn't the only game in town.

There are a growing number of 3rd-party application directory and review sites, similar to shareware directories, where you can further grow your application's popularity, traffic, and sales. Since no developer should keep all his eggs in one basket, below you'll find a complete list of iPhone application directories where you can submit your apps.

The directories are ranked by ease of submission, using the following guide: Sites ranked as an A contain an application submission form. Sites ranked as a B contain a general web contact form. Sites ranked as a C require submitting via email or other less automated processes. Sites ranked as a D do not generally accept submissions, but do provide contact information for potential reviews. So, go on out there, and promote your iPhone apps!

Do you know of a site not in the list? Follow @ksoft on Twitter and tweet us, leave a comment, or contact us and let us know.

The Great iPhone Application Directory List

1. TapDownload
iPhone application search engine. Applications appear to be added live upon submission. Applications can be submitted via submission form.
Submit here
Submission Rank: A

2. AppSafari
iPhone application directory, containing screenshots for iPhone application listings. Links directly to iTunes AppStore product page, rather than details page. Applications can be submitted via submission form.
Submit here
Submission Rank: A

3. iPhone Application List
iPhone application directory, containing editor reviews. Applications can be submitted via submission form.
Submit here
Submission Rank: A

4. Native iPhone Apps
Application directory with product detail pages and user comments. Applications can be submitted via submission form.
Submit here
Submission Rank: A

5. Apptism
Application directory and search engine. Applications can be submitted via submission form.
Submit here
Submission Rank: A

6. Planet iPhones
iPhone application news and review site. Applications can be submitted via submission form.
Submit here
Submission Rank: A

7. Yappler
iPhone application directory with developer login. Applications are automatically populated from iTunes, but can be associated with your own account, after creating one. Applications can then be managed by the developer. After logging in, be sure to click SEO Enhance for your products to remove the nofollow tags from your links. Applications can be managed after creating an account and logging in.
Submit here
Submission Rank: A

8. iPhone Apps Gallery
iPhone app directory and submit site. Submissions are reviewed after submitting via the form.
Submit here
Submission Rank: A

9. AppStoreApps
Manual review site. Applications can be submitted for review via contact form.
Submit here
Submission Rank: B

10. AppCraver
Manual iPhone app review site. Applications can be submitted for review via contact form.
Submit here
Submission Rank: B

11. iPhoneApps.co.uk
Application review directory, containing a limited number of apps. Applications can be submitted for review via contact form.
Submit here
Submission Rank: B

12. AppBank
iPhone application directory in Japan. The site is in English and Japaneese. Applications can be submitted via submission form.
Submit here
Submission Rank: B

13. iPhone Footprint
iPhone application news and review site. Applications can be submitted via submission form.
Submit here
Submission Rank: B

14. 148Apps
Manual review site. Applications can be submitted for review by emailing review.monkey at 148apps.com
Submit here
Submission Rank: C

15. AppleiPhoneApps
Manual review site. Applications can be submitted for review by emailing devcontact at appleiphoneapps.com
Submit here
Submission Rank: C

16. App Rater
iPhone application directory and user ratings. Submitting an app appears to require adding a special code to your iPhone app after completing the form. Applications can be submitted via submission form.
Submit here
Submission Rank: C

17. AppShopper
Application directory with automatic application listings. Applications can not be submitted, however if a listing is missing, submissions may be emailed to arn at appshopper.com
Submission Rank: D

18. iPhone Hacks
iPhone utility, hacks, and application directory. Applications can not be directly submitted, however requests for review may be submitted by emailing admin at iphonehacks.com
Submission Rank: D