This Android service will turn your Wi-Fi off when no application is actively using Wi-Fi for a certain amount of time while the screen is off.
The service assumes that if Wi-Fi data transfer rate is less than 64KiB per minute for 15 minutes in a row then there's no application that actively uses Wi-Fi.
Also this app can turn Wi-Fi off if there's no signal for 1 minute.
Google Play page:
https://play.google.com/store/apps/details?id=net.alkatrazstudio.wifiidletimeout
Wireless Administration of Remote System (WARS) enables system administrators manage their servers remotely using mobile devices.Currently, the project supports windows administration and SQL server 2005 administration using J2ME and .NET CF clients.