ModemTest
ModemTest is an easy to use Windows based application that allows users to test their dial up modem. ModemTest performs low level testing that is independent of your Internet Service Provider (ISP) and the TCP/IP settings on the computer. It allows the modem to be tested in addition to the phone... A local loop back is done on the analog side of the modem, ModemTest then sends data packets which are echoed back by the modem. ... The second test method requires only a single modem and no telephone line.
http://www.passmark.com/ftp/modemtest.exe - 386Kb - Download - Screenshot

Virtual Modem
There are many old data-centric applications that, for historical reasons, use direct modem connections to exchange data between Client and Server. Nowadays, local and global TCP/IP networks have made the direct modem connection obsolete. Here's why: When you use a direct modem connection, you... The virtual modems are accessible to all the applications that work through a direct modem connection. ... Setup is no different from setting up a physical modem. ... Thus, Virtual Modem should work out-of-the-box for all your communication programs.
http://www.virtual-modem.com/virtual-modem.zip - 737Kb - Download - Screenshot

NetScream
NetScream is a tool for all that allows you to modify your modem settings to increase internet performance up to 200% or higher!! No modifications to your hardware are made and all adjustments and settings are done in an easy to use interface that a child could use. ... 6/56k modem, cable modem, or DSL modem, NetScream will boost your internet connection speed. ... Notice also that NetScream will modify your modem settings to handle those annoying disconnections and hang-ups so they happen less often.
http://www.swiftdog.com/downloads/netscream.exe - 830Kb - Download - Screenshot

Throttle
Throttle is a tool for all that allows you to modify your modem settings to increase internet performance up to 200% or higher!! No modifications to your hardware are made and all adjustments and settings are done in an easy to use interface that a child could use. ... 6/56k modem, cable modem, or DSL modem, Throttle will boost your internet connection speed. ... Notice also that Throttle will modify your modem settings to handle those annoying disconnections and hang-ups so they happen less often.
http://www.pgware.com/downloads/throttle.exe - 874Kb - Download - Screenshot

Accelerate
Slow Internet connection speeds can be frustrating, and the hardware upgrades necessary to speed your system up can get very expensive. Webroot Software offers solutions designed to help you get the most out of your current Internet connection without making costly investments in hardware upgrades. ... While the maximum transfer speed of a modem/network connection can only be changed by costly hardware upgrades, Accelerate optimizes Windows settings for data transfer over modem/network connections resulting in faster download speeds, faster web site loading, and an overall increase in web...
http://www.webroot.com/download/trial/1/accsetup1.exe - 1Mb - Download - Screenshot

Express Dial Telephone Dialer
Express Dial is a phone dialer for Windows computers with a voice modem and headset. It can be used to automate the dialing of a list of numbers (as a predictive dialer) or to call single numbers when required using only your PC, modem and headset. Express Dial is designed to use a voice modem... Express Dial will use any voice modem connected to the PC's serial port so long as the modem has a headset connector or a mic and spk socket (most external modems do). ... Express Dial can be loaded with a list of phone number and it will sequentially call every number in the list.
http://www.audiochannel.net/software/dial.zip - 184Kb - Download - Screenshot

HSLAB Modem Monitor
Modem Monitor is a program for monitoring a status and performance of the remote(or local) modem or any network interface. Modem Monitor is a unique in industry program, which allows to monitor not only per-connection statistics. It allows to monitor physical modems separately! ... Modem Monitor allows you: -receive connection's statistics as for the separate modem or a network card, and for all network devices together; -view remote modem(cable modem, satellite card or any other) connection status ("Connected", "Disconnected", e.
http://www.sys-monitoring.com/downloads/hslab-modem-monitor.exe - 2Mb - Download - Screenshot

Virtual Null Modem
Null-modem cable is basically used for communication of two RS-232 DTE devices with each other. To create null-modem connection between the devices you need to use two computers or two serial ports of a single computer connected with null-modem cable. ... Virtual null-modem allows user emulate virtual null modem connection and run the two applications simultaneously on the same computer. ... The most reliable way to create null-modem connection is using of virtual serial ports emulated by virtual serial port driver and null-modem cable.
http://www.virtual-null-modem.com/download/vnullmod20.exe - 1Mb - Download - Screenshot

Modem Booster
Tired of slow surfing speed and long waits for pages and files to download? Getting delayed responses when you are gaming online? Your modem settings are not optimized! As seen on PC Magazine, Windows Magazine WinList Winner and Top 10 Download on TechWeb. ... Modem Booster features an Auto-tune options novice users to optimize their modem at a click of a button. ... com for 8 months straight, Modem Booster works with all dial-up Networking ISPs and optimizes your Internet connection settings to increase your modem speed by up to 300 per cent.
ftp://inklineglobal.net/win32/mb30.exe - 2Mb - Download - Screenshot

DEKSI Modem Pooling
DEKSI Modem Pooling (DMP) is an advanced, powerful, and feature rich client-server software system that allows you to use any serial (COM) port on a remote computer from your local computer via a TCP/IP network connection. Sharing COM ports means sharing resources like modems, ISDN adapters, X. ... DEKSI Modem Pooling needs to run the Server software on the server computer to accept and route data from the virtual port to the physical port on the server computer. ... DEKSI Modem Pooling consists of two components: The Client Component (DMPC.
http://www.deksoftware.com/new/dmp.zip - 2Mb - Download - Screenshot