Vault is an all-in-one, advanced App Locker and Lockscreen app designed to protect your Android device from intruders! Now put passwords wherever you want to!

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.

No wires, no drivers, no cables, no bluetooth only WiFi on a fresh air and browser to connect your Android device with desktop or laptop or even another android device with Droid Over Wifi app installed!
One button to start. Transfer, view, stream, rename, move, delete files and folders immediately over WiFi with any Browser and any OS.

UnlockScope App offers you the easiest, fastest and safest method to unlock your phone, giving you the freedom to use your phone with the carrier of your choice and helping you save hundreds of dollars when you travel internationally.

Android Assistant

Android Assistant is a powerful tool for browsing information on the Android platform,. This app can be used to view software information, hardware information, running services information, and network information. You can also use it to view the file system. - Access your Android device information - View software and hardware information - Explore your file system.

    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

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

A lightweight language translation tool. Use Bing translate service to translate between language pairs.

WiFiReaver. Wireless File Reaver.

Automatic key injection using Dictionary for Wireless Networks.

Inyector automático de claves mediante Diccionario para Redes Wireless.

http://WiFiReaver.blogspot.com
http://Buckynet.blogspot.com

SWardriving. Wi-Fi Wireless.

Wireless Wi-Fi Wardriving, Warbiking, Warwalking, Warjogging, Warrailing, Wartraining, BusWardriving ...

A simple application for Wardriving anywhere in the world. Do not let it escape the location of any Wireless Wi-Fi network.

Una aplicación sencilla para Wardriving en cualquier parte del mundo. Que no se te escape la localización de ninguna Red Wireless Wi-Fi.

http://SWardriving.blogspot.com
http://Buckynet.blogspot.com

This is a fieldtest/netmonitor application for UMTS/GSM/LTE/CDMA/EVDO network. This is same as G-NetTrack Pro, but without map support and is suitable for devices without Google Play services.
G-NetLog (trial) is trial version of G-NetLog which runs for limited time.

Automatically save pictures, videos, and other files when you return to your home network.

Network analysis and port scanning application

SmartPixel screen recorder helps you easily capture mobile games with no root.

List all devices in your WiFi network and get notifications about new devices

A WiFi survey/wardriving app

Save you battery consumption when you are out of your favorite places.

FreeLife SOS is one of the most comprehensive and reliable SOS applications available. It is an emergency alert app which enables you to send SMS with your location details to preset mobile numbers to ask for help. It also includes flash light and sound alert functions which could come in handy during an emergency. Refer below for a full set of features.

HostEye keeps an eye on your hosts

Check service status on your servers on the road, in a meeting or on vacation. Monitor your critical hosts and know what services are up and running or down.

Alert through emails and phones when services or hosts are down.

A must have tool for system administrators and any one who wants to monitor on their hosts, servers and system services

The application is an electronic drawing board, you can draw anthing you want on the all kinds of background with all kinds of paint. A great art brings out by your smart finger.