"Airconsole is a portable, battery powered, RS232 Serial and Ethernet over WIFI Adaptor. Designed to be used with Get Console, RapidSSH on iOS, SerialBot on Android and also on PC, MAC OSX with any other standards (RFC2217) based terminal application, Airconsole provides flexible and convienient access to physical Serial and Ethernet ports from devices (such as iPads and iPhones) that have only WIFI network interfaces."
"xPrintServer fills the gap between the productivity of iPads and iPhones and the inability to print from those devices to office networked printers.
As small as any iPhone, xPrintServer leverages Lantronix' patented technologies, along with open industry standards to enable wireless printing to nearly any printer attached to a network. No software. No apps to buy. No configuration necessary."
For $10, this app runs on Windows or Mac and lets iPhones or iPads on the network print to attached printers using AirPrint function on the device, to PDF that automatically opens on the computer, or saved to DropBox. Free 7-day trial.