ReadyBoost is a disk caching technology originally introduced in Windows Vista Operating System. The purpose of this new technology was to use the memory of an external drive e.g. USB Flash memory, SD flash memory etc in order to boost system performance.

The technology was praised a lot because it allowed users to boost system performance with the help of an external device that most people use in their daily life. However it was really sad on part of Microsoft to not provide any update to Windows XP users to use the ReadyBoost feature but then all of a sudden eBoostr came to the rescue.

eBoostr basically brings the concept of ReadyBoost to Windows XP i.e. it allows you to use an additional drive (flash memory or hard disk) as another layer of performance-boosting cache. Means you don't need to buy Vista just to enjoy this cool new technology. Here are some of the highlighted features of this application:

• Vista’s ReadyBoost benefits on your Windows XP® machine;
• Smart caches frequently used applications and files for maximum performance speed up;
• Supports both USB and non-USB removable media devices, as well as additional hard disks;
• Allows up to 4 devices for simultaneous smart caching;
• Cache file size of up to 4GB on each device;
• Compatible with all ReadyBoost® ready devices.

eBoostr comes as a free trial version, which gives you four hours of functionality each time you boot up, or costs $29 for the full version as indicated by LifeHacker.