General Utilities for various/all modems:
AT#UD Decoder Utility - Freeware utility by Stanislav V. Mekhanoshin allows you to view extensive diagnostic data produced by modems supporting AT#UD command. Version 1.1.0.0

ConnectPro - Automates dial/connect process to busy ISPs with more than one number. Also permits different initialization strings for different connectoids.

EasyMTU - Rob Vonk's freeware utility. See screenshot & more info on Speed Up Your Internet Connection page.

Net.Medic - Excellent throughput monitor. See Net.Medic Info - this is the original discontinued version supported on Win95/98 only. (It should work on NT, 2K, Me and XP systems - I've used it successfully with all, but some users may have trouble. Backup your system & use only if comfortable with dealing with potential problems)
MyVitalAgent 8.0.1 - Successor to Net.Medic - see Net.Medic Info.

WinDrivers Backup Personal Edition - free for personal use - currently available HERE (Premium Access Subscription not required).

Windows 2000/XP Build 84.40 (PCI)
Windows 2000/XP Build 84.32 (PCI-II)
Windows 2000/XP Build 84.40.1 (AMR)

1.702.11 for 6827-11 ACF3 w/ 2mb flash; external speakerphone (New 2-Jan-03)

3.500Beta2 - ACF RP56D/SP L2800-38 w/ 2mb flash. (New 2-Jan-03)
AT Commands for Smart ACF,SCM & ACFL

Rockwell AT&V2 Decoder - Freeware utility by Stanislav V. Mekhanoshin that decodes Rockwell AT&V2 and AT%S1 diagnostic reports. (Also see - AT#UD decoder above). Version 1.2.0.2

ACorp's SoftModem Booster v 5.0.2for Softmodem driver versions 7.x.x. Beta release - Win2k&XP only - use at your own risk and discretion.

HSF2 Driver version 7.12.02from DDiX Labs - beta. For Windows 2000 & XP only.

HSF2 64-bit Windows Driver version 7.17.00 from DDix Labs - beta. FOR 64 BIT WINDOWS ONLY.

HCF2 Driver version 2.173.043from DDiX Labs - beta. For Windows 2000 & XP only.

HCF-USB Driver 2.173.041from DDiX Labs - beta. For Windows 2000 & XP only.

The Doctor's HxF Booster 4.3 Lite(works with all HCF/HSF to tweak settings)
HxF Booster 4.2 Lite & old HSFBooster Program

HSF2 Modems -
6.00.03 Driverfor PCI IDs 127A_1025 & 14F1_2F00 from the Doctor.

NEW 12-Feb-03 HCF/HCF2 Driver 2.1.2.173.019:
Universal Win98 & Me Driver (2.1.2.173.019)
Universal Win2000 & XP Driver (2.1.2.173.019)

17-Jun-02 - HCF Driver 2.1.2.173.001:
*NOTE* Support for all HCF/HSF modems with the drivers below is not assured -
I strongly recommend download & use of the WinDriverExpert driver backup software first!
Universal Win 95 Driver (2.1.2.173.001)
Universal Win98/Me Driver (2.1.2.173.001)
Universal Win2K/XP Driver (2.1.2.173.001)
New HCF USB Beta Driver Version 2.1.2.172.056: for Win2k/XP
NOTE: You may send bug addresses and comments on above drivers to the developer at: modemhelp@fromru.com; however, do not expect a reply to your e-mail.

Universal Generic HCF Driver for Win95/98/Me (2.1.2.172.039.001 ©Igor Belyanin)
Universal Generic HCF Driver for Windows 2000 & XP (2.1.2.172.039.001 ©Igor Belyanin)
Universal Generic HSF Driver for Win95/98/Me (4.06.08.004 ©Doctor)
Universal Generic HSF Driver for Windows 2000 & XP (4.06.08.004 ©Doctor)

ACorp.ru EUS HCF Driver WinXP - USB (2.1.2.172.052)
Drivers below will work with data/fax/speakerphone HSF only:
ACorp.ru HSF Beta Win95/98 (4.06.09)
ACorp.ru HSF Beta WinMe (4.06.09)
ACorp.ru HSF Beta Win2k (4.06.09)
ACorp.ru HSF Beta WinXP (4.06.09)

Tweaked HCF driver (see this page for more info)

Conexant V.92 HCF/HSF Command Reference Manual (PDF)
Conexant SoftModem Command Reference Manual (PDF V.90)
Conexant Smart ACF (ACF2) Command Reference Manual (PDF)

ACF3 Beta Driver for 64-bit Windows - version 5.00.00 from DDix Labs.

ESS AT Command Reference(Pdf)

CL-MD562X Preliminary Data Book (PDF)

4.20.01 for Windows XP & 2000 - for Smartlink PCI Softmodem (3,476,055 bytes)
4.20.01 for Windows 98 & Me-for Smartlink PCI Softmodem (3,211,409 bytes)

Self-signed SL2800 64-bit driver- see the Smartlink page for more information about this & use at your own risk and discretion.

Lucent/Agere Modems:

Lucent/Agere Wildwire Driver Version 2.86
Lucent/Agere Wildwire Driver Version 2.92 (Win 95/98)
Lucent/Agere Wildwire Driver Version 2.92 (Win NT)
Lucent/Agere Win2k WildWire Driver

Lucent/Agere 'LT Win Modem' Drivers
'LT Win Modem Drivers' available with premium access include:8.30, 8.28, 8.24, 8.22, 8.20, 8.10, 6.04, 6.0, 5.97, 5.92, 5.87, 5.75, 5.70, 5.66, 5.65, 5.54, 5.53, 5.49, 5.44, 5.43, 5.39 and 5.32.
Also - LT V.92 Modem on Hold 1.76, 1.72, 1.71, 1.70, 1.68 and 1.64

AT-Command Reference(DSP modem)

'LT Win' Linux Drivers:
8.26a9.tar.gz
6.00c.tar.gz

For LSI/Agere/Lucent MDC SoftModems (Modem Daughter Card versions found in Notebook Computers):
Version 2.1.81 for Windows XP & Vista(755,331 bytes) Readme
Version 2.1.81 for Windows Vista 64-bit(786,602 bytes) Readme
Version 2.1.73 for Windows XP & 2000 (763,552 bytes) Readme
Version 2.1.73 for Windows XP 64-bit (787,652 bytes) Readme
Version 3.1.98 'Generic' (XP)
Version 3.1.106 'Generic' (XP)
(203,713 bytes)
Modem-on-hold V 1.77Readme
Modem-on-hold V 1.76Readme

For LSI/Agere/Lucent USB SoftModems:
Version 2.1.81 for Windows XP & Vista(753,647 bytes) Readme
Version 2.1.81 for Windows Vista 64-bit(784,929 bytes) Readme
(203,713 bytes)

For LSI/Agere/Lucent PCI SoftModems with SV92P, SV92P2, SV92PL, SV92PP:
Modem-on-hold V 1.78Readme(203,713 bytes)
Modem-on-hold V 1.77Readme
Modem-on-hold V 1.76Readme
Modem-on-hold V 1.72Readme
Modem-on-hold V 1.71Readme
Modem-on-hold V 1.70
Modem-on-hold V 1.68Readme
Modem-on-hold Documentation (.pdf)

Version 2.1.81 for Windows XP & Vista(753,953 bytes) Readme
Version 2.1.81 for Windows Vista 64-bit(785,848 bytes) Readme
2.1.73 for Windows XP & 2000 (756,551 bytes)
2.1.73 for 64-bit Windows XP (786,661 bytes)
2.1.73 Readme

2.1.65 for Windows XP & 2000 (721,020 bytes)
2.1.65 for 64-bit Windows XP (752,624 bytes)
2.1.65 Readme

2.1.54(b) for Windows XP & 2000 (includes support for SV92P & SV92PP) (719,432 bytes)
2.1.54(b) Readme

2.1.54 for Windows XP & 2000
2.1.54 Readme

2.1.51 for Windows XP & 2000
2.1.51 Readme

2.1.49 for Windows XP & 2000
2.1.49 Readme

2.1.47 for Windows 98
2.1.47 for Windows Me
2.1.47 for Windows NT
2.1.47 for Windows XP & 2000(modem speaker)
2.1.47 for Windows XP & 2000(no modem speaker)
2.1.47 Readme

2.1.46 for Windows XP & 2000
2.1.46 Readme

2.1.40 for Windows 98
2.1.40 for Windows Me
2.1.40 for Windows NT
2.1.40 for Windows XP & 2000
2.1.40 Readme

2.1.38 for Windows 98
2.1.38 for Windows Me
2.1.38 for Windows NT
2.1.38 for Windows XP & 2000
2.1.38 Readme

2.1.36 for Windows 98
2.1.36 for Windows Me
2.1.36 for Windows NT
2.1.36 for Windows XP & 2000
2.1.36 Readme

2.1.34 for Windows 98
2.1.34 for Windows Me
2.1.34 for Windows NT
2.1.34 for Windows XP & 2000
2.1.34 Readme

2.1.32 for Windows 98
2.1.32 for Windows Me
2.1.32 for Windows NT
2.1.32 for Windows XP & 2000
2.1.32 Readme

2.1.31 for Windows 98
2.1.31 for Windows Me
2.1.31 for Windows NT
2.1.31 for Windows XP & 2000
2.1.31 Readme

2.1.30 for Windows 98
2.1.30 for Windows Me
2.1.30 for Windows NT
2.1.30 for Windows XP & 2000
2.1.30 Readme

2.1.29 for Windows 98
2.1.29 for Windows Me
2.1.29 for Windows NT
2.1.29 for Windows XP & 2000
2.1.29 Readme

2.1.25 for Windows 98
2.1.25 for Windows Me
2.1.25 for Windows NT
2.1.25 for Windows XP & 2000
2.1.25 Readme

2.1.23 for Windows 98
2.1.23 for Windows Me
2.1.23 for Windows NT
2.1.23 for Windows XP & 2000
2.1.23 Readme

2.1.22 for Windows 98
2.1.22 for Windows Me
2.1.22 for Windows NT
2.1.22 for Windows XP & 2000
2.1.22 Readme

2.1.21 for Windows 98
2.1.21 for Windows Me
2.1.21 for Windows NT
2.1.21 for Windows XP & 2000

2.1.18 V.92 for Windows 98
2.1.18 V.92 for Windows Me
2.1.18 V.92 for Windows NT
2.1.18 V.92 for Windows XP & 2000
LT Modem-on-Hold 1.65

For Venus chipset:
Modem-onHold V1.70 MoH for use with updated firmware from vendor.