1. 2018 stack overflow developer survey https://insights.stackoverflow.com/survey/2018/. 2018 stack overflow developer survey https://insights.stackoverflow.com/survey/2018/.
2. Adobe Photoshop http://www.photoshop.com. Adobe Photoshop http://www.photoshop.com.
3. Android architecture components https://developer.android.com/topic/libraries/architecture/index.html. Android architecture components https://developer.android.com/topic/libraries/architecture/index.html.
4. Android studio layout editor https://developer.android.com/studio/write/layout-editor.html. Android studio layout editor https://developer.android.com/studio/write/layout-editor.html.
5. Android UI/Application Exerciser Monkey http://developer.android.com/tools/help/monkey.html. Android UI/Application Exerciser Monkey http://developer.android.com/tools/help/monkey.html.