All our Mobile Apps are Open Source.
We have made Open Source development as a key part of our mobile app development strategy and continue to release open source android and iOS software in github
Even in enterprise mobile app development projects, after completion of project, the source code of project with guidelines is sent to client.
https://github.com/search?o=desc&q=android&s=stars&type=Repositories&utf8=%E2%9C%93
https://en.wikipedia.org/wiki/List_of_free_and_open-source_Android_applications
https://code.google.com/hosting/search?q=label%3aAndroid
https://github.com/dkhamsing/open-source-ios-apps
https://github.com/search?o=desc&q=iOS&s=stars&type=Repositories&utf8=%E2%9C%93
http://iphonedevwiki.net/index.php/Open_Source_Projects
https://developer.apple.com/opensource/
https://developer.apple.com/swift/resources/