What are some iOS SDK for developers to build awesome apps?Artboard


Some interesting SDKs

Cross platform SDKs for iOS:
(Appcelerator Titanium vs PhoneGap: which produces better native apps? , Would you recommend Rhomobile Rhodes or Appcelerator Titanium for (non-native coding) native apps?)

  • PhoneGap SDK
  • Appcelerator Titanium SDK
  • Corona SDK
  • Rhomobile SDK

Analytics
(What is the best mobile analytics service for iOS apps and why?)

  • Flurry (company)
  • Mixpanel (product)
  • Localytics
  • Apsalar

Cloud

  • Parse Platform (cloud backend)

Bug/Crash Reporting
(How do Crashlytics, Apphance, BugSense, Crittercism and TestFlight Live compare?)

  • HockeyApp (http://www.hockeyapp.net/)
  • Crittercism
  • Apphance
  • BugSense
  • Hoptoad

Text Messaging/Voice/Telephony APIs
(What, if anything, separates Twilio from its competitors (46elks, Aculab Cloud, Angel, etc.)? , Is there an alternative to Twilio that allow users of your sms-sending-app to buy SMS credits directly?)

  • Twilio
  • Tropo
  • 46elks
  • Callfire
  • http://blog.programmableweb.com/2012/06/19/373-telephony-apis-twilio-skype-and-tropo/

Engagement

  • Socialize (http://www.getsocialize.com/)
  • App Booster (http://appsfire.com/appbooster)

Mobile Commerce

  • card.io SDK
  • Jumio (company) SDK

Geolocation

  • Geoloqi SDK
  • Skyhook SDK
  • Gimbal SDK by Qualcomm

Augmented Reality
(Which AR (Augmented Reality) libraries exist on Android/iPhone?)

  • Junaio by Metaio
  • Vuforia by Qualcomm
  • Satch by Total Immersion
  • Obvious Engine by Harmonypark
  • Layar Player by Layar
  • Wikitude

Mixed

  • Seatwave SDK (http://www.seatwave.com/developer)