NitroXP 1.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The following version: 1.0 is the most frequently downloaded one by the program users.
We recommend checking the downloaded files with any free antivirus. The software lies within System Utilities, more precisely File Managers. The common filename for the program's installer is NitroXP.exe. This tool was originally developed by RoadSide Software, LLC.
From the developer:
NitroXP is the tweaking tool designed for Windows XP. NitroXP can optimize your Internet connection, memory, and more. NitroXP can decrease shutdown time by decreasing the amount of time Windows waits for a program to close and by disabling the shutdown sound. NitroXP can increase the speed of Windows XP by forcing Windows to keep important operating system components and drivers in the RAM.
You may want to check out more software, such as Stellar Phoenix Mailbox Professional, S.M.A.R.T. Disk Monitor or Card Reader, which might be similar to NitroXP.