Smartphones are surely acting up as great personal devices. Some devices come with basic managers on stock firmware. Yet, there are plenty to download from Play Store. These managers come with task managers, backup and restore options, system usage statistics and more. System Tuner (free and paid version) is a great package among those Android manager apps. It is a system suite which allows users to monitor, record and analyze system activities with system features, widget and notifications optimization. App is still new but has good reviews overall based on performance and battery consumption.
CPU manager features works only for rooted devices. Users can tweak CPU settings. Kill apps automatically or manually and view app details based on memory and SD. Backup, restore and uninstall user apps from Application Manager. Keeping in mind, only .apk files are backed up. It can turn out to be great if your device is rooted. Extra features would be granted, such as: freeze and unfreeze app, remove app from start-up etc.
Activity recorder allows user to record activities include apps, process, and device state. Detailed Log reader displays logs with filters and clear option. Users can save scripts, run existing scripts, run commands as Super User (root only) and keep history of commands from the Terminal Emulator.
Another great option for Root users is system tweaker. Boost performance by doing quick tweaks on SD cache size and adjust auto-kill memory settings. Users can also set notifications and create widgets. Download and give it a try. The app is still new but the effort put into it is clearly visible in terms of usability for root and non-root users.