Modem Booster
Modem Booster is a Internet speed booster that speeds up Web browsing, file downloading, emailing and online gaming dramatically. A much cheaper alternative to DSL or cable modems, Modem Booster can boost average Internet speed by 10-50% on the average and up to 300% on the extreme, making a 56k blaze like a DSL modem. This window utility tests Internet performance and tweaks the TCP/IP settings accordingly via a systematic fine-tuning process to match with your ISP. There is no need for you to know difficult terms like MTU, RWIN, TTL and Cachesize before you can optimize your modem settings, unlike other MTU tweaking utilities. Just click a button and Modem Booster will run the diagnostics and tune-up automatically. After tuning-up, anyone can speed up their surfing by clicking on Modem Booster's one click dialer before they go online.
http://www.inklineglobal.com/products/mb/

DunSpeed
Speeds up the Internet connection by adjusting the TCP/IP settings, and adding extra settings to the Windows Dial-Up Adapter Properties window for fine tuning. [Win95/98/Me]
http://www.camtech2000.net/Pages/Dunspeed.html

WinCustomizer
WinCustomizer - Customize windows to your needs
http://www.thunderbird-software.com/products/wincustomizer/

CBS Software: SpeedConnect
The software solution for a faster Internet connection, quicker downloads, faster email and browsing. A software optimizer for Dial-Up (Modem), LAN, Cable, xDSL, Satellite, Wireless and Highspeed LAN / T1 internet connections. Improve Skype connection.
http://www.cbs-soft.com

COM PORT AND INTERRUPTS
Lists for common interrupt (IRQ) values or settings and COM Port default settings.
http://www.mvps.org/winmac/comirq.html

Globesoft
MultiNetwork Manager is designed to toggle among multiple TCP/IP, LAN, or dial-up settings in Windows. It also incorporates RAS dialing as well as Windows network settings. [Windows XP/NT/ME/95/98/2000]
http://www.globesoft.com/

Changing user_pref Settings
Changing user_pref Settings for the prefs.js configuration file
http://chinese-school.netfirms.com/computer-article-Netscape-userprefs.html

Browser Hijack Retaliator
Internet Explorer browser hijack protection program which keeps browser settings safe from browser hijacking, and lets you revert back to saved browser settings.
http://www.zamaansoft.com/products/bhr/

4.x Communicator Preferences
How to set-up various Netscape settings.
http://www.warpdoctor.org/lib/info/jsprefs.htm

MetroGnome
MetroGnome is a metronome for Mac OS X. It is VERY customizable, with settings such as subdivisions, time signatures, accents and mutes, translucent window flashing, silence, and a choice between fast and slow 8 subdivisions of tempos in /8
http://www.braxtech.com/metrognome/