Free optimizer software for windows

Optimizer XP helps you optimize your computer to its best performance with no options.No experience required. Just select mode to optimize or restore your system.
Optimizer XP is a freeware optimizer program but more powerful than some shareware optimizer programs. Optimizer XP is a new generation of PC Tweak and improves many functions.

A program for tweaking broadband-related Registry settings.
The TCP Optimizer is a free, easy Windows program that provides an intuitive interface for tuning and optimizing your Internet connection. Just download and run, there is no installation required.
The program makes it easy to find the best MTU and RWIN values, test latency and tweak all the important broadband related registry parameters. The Optimizer can be helpful with tuning any Internet connection type, from dialup to Gigabit+ :)
If you need help with the program, check the TCP Optimizer documentation, read our broadband tweaking articles, the Optimizer FAQ, and/or visit our Forums. As an alternative, you can try one of our generic Registry patches instead.
Optimize Dialup, DSL and Cable all from one simple to use interface. (It has the option to return your Registry to its default untweaked state as well) It also includes built in MaxMTU and Latency(Ping) detection utilities.

Run the files encoded by the Zend Guard, while enhancing the performance of PHP applications The Zend Optimizer is a free application that will run the files encoded by the Zend Guard, while enhancing the performance of PHP applications.
For enterprise-class performance enhancement with an up to x25 increase in server throughput, try Zend Platform.
Zend Platforms Performance Enhancement Technology was specifically created to help optimize the responsiveness and processing efficiency of robust, high traffic PHP-based sites. At the same time, Zend Platforms PHP Intelligence Module provides insight into performance bottlenecks and run-time errors.
System requirements:
- AIX pSeries 5
- Supported Web Servers:
- Apache 1.3.x
- Apache 2.0.x (Prefork mode only)
- Apache 2.2.x (Prefork mode only)
- IIS 5, 6
- PHP Compatibility
- Supported PHP versions:
- 4.2.x up to 4.4.x
- 5.0.x, 5.1.x, 5.2.x
NOTE: For PHP versions below 4.0.4, use the Zend Optimizer 1.2.0.
Benefits:
Enables users to run files encoded by the Zend Guard

Startup Optimizer inspects programs loading at Windows startup and keeps your PC running faster, cleaner, and error-free. With a program database, Startup Optimizer provides useful information for known programs. You can remove harmful programs like spyware, virus, diallers, make your system healthier and maintain a higher degree of privacy. Startup Optimizer removes junk and obsolete programs, frees up RAM and increases your system performance. Startup optimizer allows to add, remove and edit list of startup programs efficiently, backup and restore them.
Startup Optimizer allows to edit list of startup programs efficiently, backup and restore them, adds advanced startup conditions and events for programs, controls all startups sections with its monitor.

M Internet Optimizer is a free and useful internet connection optimizer utility that comes with many features.

XP Memory Optimizer 1.0 is a program for displaying your CPU, Memory, Disk and Network utilization status. The program refresh itself any customable time duration, so you will be able to see all data live. It's composed by fully configurable small graph and it can work in the tray area also.