Adorn is an open-source wallpaper application available for Android devices (Soon will be available for iOS). It has a unique UI and handpicked wallpapers to choose from.
Click here to know more about the app creation & source code.
Replace Plus is an extension that helps you quickly replace one kind of selected text with another list of text. This looks very simple but it is very effective in day-to-day development.
Adorn Wallpapers