Forums in the Mobile App Development Niche

1. Tech Support Guy
Forum has 8,688,007 posts.
http://forums.techguy.org/  

2. Apolyton Civilization Site
Just missed out on a spot in the top 25.
https://apolyton.net/forum.php  

3. PetGroomer.com GroomerTALK and
Forum has 55,200 topics.
http://www.petgroomerforums.com/chat/forum.php  

4. Ubuntu Forums
A help and support forum for Ubuntu Linux.
http://ubuntuforums.org/  

5. www.dreamincode.net
https://www.dreamincode.net/forums/  

6. PPCGeeks
PPCGeeks is a site for PPC owners with discussion, reviews, news, links, downloads, and much much more. We cover Windows Mobile, Android, Windows Phone 7, Blackberry, iOS, and tablets.
http://forum.ppcgeeks.com/  

7. www.daniweb.com
Programming Forum - Our Programming forum category encompasses application development, web development, programming theory, and everything in between.
https://www.daniweb.com/programming/4  

8. Actualized.org Forum
A community of people interested in self-actualization, personal development, consciousness work, meditation, and enlightenment. Ask questions, share resources, get advice. Join for free.
https://www.actualized.org/forum/  

9. Webmasters, SEO, Internet Marketing & Digital Marketing Forum
WebmasterSun is the most popular webmaster and internet marketing forums. You will find more useful information and resource here!
https://www.webmastersun.com/forums/  

10. Site Owners Forums
Forum has 55,768 members.
https://siteownersforums.com/  

11. thepersonaldevelopmentforum.com
Learn about Wisdom, Happiness & Excellence. Life-improvement, Personal Growth and Self-help.
https://thepersonaldevelopmentforum.com/  

12. ABestWeb Affiliate Marketing
Forum has 1,087,333 posts.
http://www.abestweb.com/forums/  

13. RaGEZONE
Create your own MMO and MMORPG game server or find free MMORPG servers. Download the latest MMORPG server files or sell your game gold and mmorpg account. We also have programming tutorials ,...
https://forum.ragezone.com/  

14. The PokéCommunity Forums
This is a Pokémon forum for Pokémon fans all over the world. Discussions include games, trading card game, strategies, TV series, movies, role play, fan fiction, and trivia
http://www.pokecommunity.com/  

15. Neowin
News, Reviews & Betas which includes large community peer support
https://www.neowin.net/forum/  

16. GSM-Forum
Welcome to gsm-forum, here you find all infos about android, windows mobiles, iphones, flashing, repair, unlocking, root, development software, firmwares.
https://forum.gsmhosting.com/vbb/  

17. Black Sea Studios Forums
Black Sea Studios forums
http://forums.blackseastudios.com/  

18. CodingForums.com
Web coding and development forums. Get help on JavaScript, PHP, CGI, CSS, XML, and more.
http://www.codingforums.com/  

19. Webmaster Forums
Webmaster forums offers help and resources in web development, website design, web hosting, search engine marketing, HTML, XML, Perl, Java, JavaScript,xhtml CSS, PHP, mySQL, SEO and web design
http://www.webmasterforums.com/  

20. Whirlpool.net.au
https://forums.whirlpool.net.au/  

21. Muscular Development Forums
Forum Description
https://forums.musculardevelopment.com/forum  

22. Stargate SG-1 Roleplaying Game
https://stargatetherpg.com/forums/  

23. VBForums
Visual Basic Discussions plus .NET, C#, game programming, and more (http://www.VBForums.com)
https://www.vbforums.com/forum.php  

24. Manx Forums - A Discussion Board & Classifieds for the Isle of Man
Forum has 872,950 posts.
https://www.manxforums.com/forums/  

25. CodeGuru Forums
Hard hitting articles, dicussions, resources, and more all focusing for real developers in the real world.
https://forums.codeguru.com/index.php  

26. kirupaForum
Got a web design/development question or just want to hang out with the most awesome people on the planet? Drop on in!
http://www.kirupa.com/forum/  

27. Overclockers UK Forums
Forum has 19,819,534 posts.
http://forums.overclockers.co.uk/  

28. DJI Tello Drone Forum
DJI Ryze Tello Drone Help, Discussions and Community. If you fly the DJI Tello then you'll want to join TelloPilots.com to discuss the latest technologies and uses for the Tello drone.
https://tellopilots.com/  

29. WarriorForum
Forum has 545,397 topics.
http://www.warriorforum.com/  

30. Java Forums at the Big Moose S
https://www.coderanch.com/forums/  

31. RPG Maker Forums
Forum software by XenForo
https://forums.rpgmakerweb.com/  

32. Home Theater Forum and Systems
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, home theaters, troubleshooting, projects, DIY’s, product reviews and more!
http://www.hometheatershack.com/forums/  

33. www.go4expert.com
Forum has 97,250 posts.
https://www.go4expert.com/forums/  

34. Overclock.net
A forum community dedicated to overclocking enthusiasts and testing the limits of computing. Come join the discussion about computing, builds, collections, displays, models, styles, scales,...
http://www.overclock.net/f/  

35. Zend Forums
Forum has 44,635 posts.
http://forums.zend.com/  

36. BeerSmith Home Brewing Forum
BeerSmith discussion forum
https://www.beersmith.com/forum/index.php  

37. BattleOn Forums!
https://forums2.battleon.com/f/  

38. KVR: Forum Index
KVR Audio Forum - Forum - VST Plug-in, AU, AAX, Audio Software Discussion
https://www.kvraudio.com/forum/  

39. SysOpt Forums
This is a discussion forum for all aspects of computer systems optimization and customization
https://www.sysopt.com/forum.php  

40. MacRumors Forums
Apple news and rumor discussion
http://forums.macrumors.com/  

41. The Admin Zone
Resources for Forum Administrators!
https://www.theadminzone.com/  

42. geekvillage.com - Home to the Geek/Talk Discussion Forums
Webmaster Forums @ geek/talk. Signature-free discourse for serious web publishers
https://www.geekvillage.com/forums/  

43. Newgrounds.com
https://www.newgrounds.com/bbs/  

44. Elite Trader
Elite Trader is the #1 site for traders of stocks, options, currencies, index futures, and cryptocurrencies.
http://elitetrader.com/vb/  

45. Accessify Forum: Web Accessibility Discussion Forums
Discussion about making websites accessible to people with disabilities.
http://www.accessifyforum.com/  

46. www.elitetrader.com
Elite Trader is the #1 site for traders of stocks, options, currencies, index futures, and cryptocurrencies.
https://www.elitetrader.com/et/  

47. Viewing list of forums
The SoundDomain forum is the place to go for all your car audio, stereo, installation, and mobile video questions.
http://forum.sounddomain.com/ubbthreads.php  

48. GolfWRX
Golf news, equipment, reviews, classifieds and discussion
http://www.golfwrx.com/forums/  

49. Digital Spy
Digital Spy Forum and Community, a place to discuss the latest TV, Movie and entertainment news and trends.
http://forums.digitalspy.co.uk/  

50. Vertical Reference Helicopter Forums
Forum has 125,652 posts.
https://helicopterforum.verticalreference.com/