OpenUDID provides a cross-platform method for generating globally unique per-device identifiers. UDIDs are used for analytical or CRM purposes, such as to track how much time users spend in free apps before upgrading to the paid version, or for tracking the source of a download when advertising on an ad network.
Wenity is a multi-platform Zenity clone that helps (shell) script writers to interact with their users through various types of GUI dialogs. Scripts call Wenity and receive the user's selection in the exit code/response file. It supports any operating system with Java and a GUI installed, supports complex return types by using response files, and has a modular architecture supporting different functions: simple dialogs (user input, information, question, error/warning), progress indicator dialogs, system tray notifications, file choosers, and file viewers (text and HTML).