No/Low code tools for app building
AppSheet - https://www.appsheet.com/create/how-to-create-an-app - Easy to build apps from spreadsheets
Mighty Networks - https://www.mightynetworks.com/pro - Create your own branded/social app
ShareTribe - https://www.sharetribe.com/ - Create a marketplace app
Thinkific - https://www.thinkific.com/ - Create an app for selling online courses
CloudMatch - https://cloudmatchapp.com/ - Create your own tinder style matching app
Stencyl - http://www.stencyl.com/ - Create a game
UI/Logo Design
99Designs - https://99designs.com/ - Quality custom graphics
Design Pickle - https://designpickle.com - Professional graphic designers