The latest EsiObjects client kit can be downloaded from here. This kit requires Windows XP or Windows 2000+. As a convenience, the Java Gateway portion of the EsiObjects Client Kit is also available as a separate 1 MB download.
In order to use EsiObjects, you will need to download the latest EsiObjects Server Kits as well.
To install the EsiObjects client kit, unzip the client kit and run setup. Follow the instructions in the release notes.
To install the EsiObjects server kit, unzip the server kit and follow the instructions in the readme.txt file. Once you have installed the kit, you should take the Getting Started tutorial to learn how to use EsiObjects.