The Haiku source is continually built by a dedicated machine. These "nightly images" are provided mainly for development and testing purposes. You can download and install these snapshots to check out the latest features and bugfixes, be aware though that they may be unstable at times.
The GCC 2 Hybrid images on this page are recommended, as they are the most similar to official releases. Developers who choose to release software that requires a nightly build, are requested to provide a build for the latest stable nightly image.
For more information on missing packages, image and archive formats, etc., please refer to this site's main page.
Recommended Nightly Images (x86 GCC 2 Hybrid)