Chattha Sangayana Tipitaka 4.0 is a desktop client for browsing and searching the Pali Canon. It is the successor to the Chattha Sangayana CD 3.0. CST4 is under development and is available for download from this site in a pre-release version.
CST4 is currently available only for Windows XP or Windows Vista. A native Mac client is planned for early 2008.
Click the "Installation" link on the right to download and install the program.