Network Counter is Android (2.2+) application for monitoring of wireless network data traffic.

Features:
- Displays data traffic usage statistics for Wi-Fi and cellular / mobile networks.
- Possibility to setup an alarm for Wi-Fi and mobile data traffic usage.
- Network traffic statistics for currently active (running) applications.
- Ability to backup and restore of data traffic usage database.

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Emergency Manager now on Tablets.
Emergency Manager Trial(FREE)is a complete emergency situation management app for android devices which is equipped with emergency service numbers for over 200 countries. You can send SMS requesting help with your current location (GPS and Network)just with a single touch. It also uses the enormous outreach of the social-networking media (Facebook to post emergency alerts on your behalf, so that help can be always at hand. Also provides multilingual support.

Access,manage and transfer files on your android device over WiFi

Android network tool: discover hosts (ping/connect/DNS) and scan them in your Wifi network.

    安安卜是一款集文件管理、任务管理、来电防火墙、短信过滤、网络管理、数据库管理、垃圾清理、开机加速、内存管理、监控器于一体的Android管理软件，全面管理android系统问题。
    AndBox is a set of files management, task management, call firewall, SMS filtering, network management, database management, garbage clean, boot speed, memory management, monitor management software, Overall management of the android system problems.

More http://code.google.com/p/andbox/
https://www.slideme.org/user/18222/applications/18222

Upload or download files to / from your device, from any web browser.
New, you can now send and receive files between Android devices.
Need to send to your PC, 1,100, 200 files, and receive 1, 100, 200 files?, then this is your app.

Free Edition
This app only works with phones that have root/super user access (e.g. the Development Phone). This app tethers your cell phone's Wifi internet connection to your PC. The connection between your phone and PC is a bluetooth PAN connection. Please visit http://www.androidactivity.com/tetherBlu.html before installing!
This is the Free version which will only work if you have a wifi internet connection on your phone. If you want to tether the cell internet connection try the Premium version.