Android: If you're a fan of detailed system overviews for devices big and small, Android System Info is a task manager for Android phones packed with details about your phone's hardware and software.
With Android System Info you can get a broad overview in the Dashboard which shows battery life, and how much internal memory, SD card storage you have, as well as details on RAM usage, uptime, network type and your IP address. The System menu offers fine-detail views of your OS settings, hardware configuration and more. In the Tasks menu you can check on all the processes running on your phones, jumping into the process (if it's a user-accessible app) or ending the task. The Apps tab catalogues all the apps you have installed on your phone and the Logs tab keeps a detailed log of what is going on in your phone (so detailed in fact, that unless you're developing an app or very curious about your phone, you'll likely skip over this tab).
Android System Info is a free application and works wherever Android does. You can download it by searching for "Android System Info" in the Android Market or by scanning the QR code at right.