SoftCollection Impulse Counter supports up to 12 counting processes via single Parallel Port.

Communicate directly with an open TCP or UDP port on a machine. This can be very useful for low-level troubleshooting of server issues when using any of the clear-text based protocols such as FTP, Telnet, HTTP, etc. Also a great learning tool. (Free)

TVicPort are general purpose shareware device drivers for use with practically any programming language. They allow you to access and control hardware directly from within a Win32 application without using the Windows DDK.

Bluetooth Framework - library of Delphi VCL components for work with mobile devices (PDA, Cellular Phones). Allows to carry out communication with the device through: Bluetooth, IrDA, Serial port.

AVSD is appointed for emulation of one, two or more (up to 200) serial streams. Hardware devices are not necessary. This product is based on Windows XP DDK and doesn't require using devices of other manufacturers.

Simply CallerID is a simple, but full featured callerID program. At only $7.00, the program is by far the most affordable on the market. Includes database logging, aliasing, call blocking and various forms of notification.

IPCheck Mobile GUI offers reliable network and website monitoring through your PocketPC. Sensor types include PING, PORT, HTTP, HTTPS, Advanced HTTP, HTTP Transaction, DNS, SMTP, POP3, SNMP and custom.

Plax Network Suite is an easy to use collection of network tools which offers full control over the online activity of your PC. Instant ON/OFF switch for Windows XP Firewall, block ping, show open ports and applications and do port scanning.