FireTune is a small program that will help firefox users optimize the browser, includes all the performance optimizations. The only thing you must do is: make your selection. FireTune does the work for you.

How to use it? first you need to clear cache of Firefox from the Firefox settings dialog, after this step finish close Firefox, and optimize it with FireTune
Start Firefox again, and repeat the speed test on http://www.mozilla.org/products/firefox/
Compare the displayed result with the result from the test before the optimization

offers what you need to customize and optimize Windows Vista:

Unlike other tweaking utilities, TweakVI bundles lots of different utilities in one. It was developed to combine both tuning and optimizing features to increase the speed of your Windows Vista system. It’s the worlds first software for Windows Vista to combine both customization, tweaking and optimization features.

Heaps of free plugins are included with the freeware ‘Basic Edition’ of TweakVI. Additional plugins are available to subscribers and new plugins will be released from time to time once they become available. Subscribe today and immediately download up to 13 additional plugins for TweakVI.

SoftPerfect Network Scanner is a free multi-threaded IP, NetBIOS and SNMP scanner with a modern interface and several advanced features. It is intended for both system administrators and general users who are interested in computer security. The program pings computers, scans for listening TCP ports and displays which types of resources are shared on the network (including system and hidden).

In addition, it allows you to mount shared folders as network drives, browse them using Windows Explorer, filter the results list and more. SoftPerfect Network Scanner can also check for a user-defined port and report back if one is open. It can also resolve host names and auto-detect your local and external IP range. It supports remote shutdown and Wake-On-LAN.

Key features

* Pings computers.
* Does not require administrative privileges.
* Detects hardware (MAC) addresses even across routers.
* Detects hidden shared folders (normally invisible on the network) and write accessible shares.
* Detects your internal and external IP addresses.
* Scans for listening TCP ports and SNMP services.
* Retrieves currently logged-on users.
* You can mount and explore network resources.
* Can launch external third party applications.
* Exports results to HTML, XML, CSV and TXT
* Supports Wake-On-LAN and remote shutdown.
* It is absolutely free, requires no installation, and does not contain any adware/spyware/malware.