So far there have been six alpha releases of the forthcoming Ubuntu 9.04, due for final release next month, and late yesterday the one and only beta release was made available for download. From this point forward there's a release candidate in mid-April, before the final release is made on the 23rd.

"After another batch of fixes, tweaks, and buckets of polish, we’ve prepared the hopefully last step before 2.0 can go final: Release Candidate 2. If nothing major pops up, expect the final version to land within the next week or two at the most..."

Firefox 3.6.4 is the last major release before the eventual Firefox 4.0, to be released in Nov 2010. Release candidate of Firefox 3.6.4 was available for download on the last week of May 2010, and it was expected that the final release of Firefox 3.6.4 would happen in the first week of June 2010.

Lucid Lynx, otherwise known as Ubuntu 10.04, is now in the final stretch. Yesterday the Ubuntu Developers announced the Release Candidate, the penultimate release before its final April 29 release.

An update to the Firefox 3.6 Release Candidate is now available. This second release candidate is available for free download and has been issued as an automatic update to all Firefox 3.6 Beta and Release Candidate users.

The Ubuntu team is pleased to announce the Release Candidate for Ubuntu 10.04 LTS (Long-Term Support) Desktop and Server Editions and Ubuntu 10.04 LTS Server for Ubuntu Enterprise Cloud (UEC) and Amazon's EC2, as well as Ubuntu 10.04 Netbook Edition.  Codenamed "Lucid Lynx", 10.04 LTS continues Ubuntu's proud tradition of integrating the latest and greatest open source technologies into a high-qu

Ubuntu 10.10 codenamed 'Maverick Meerkat' just reached to Release Candidate version. The final version will be released on October, 10.I have been testing Ubuntu 10.10 from 2nd Alpha onwards. The development have been going at fast pace with constant addition of new features and bug fixes.

Firefox 3 Release Candidate has been released. It includes only minor performance, UI, and compatibility tweaks. If no issues are found with the release candidate, it will become the final release.

The KDE team is getting very close to a final release of KDE 4.4. The second release candidate came out yesterday as a testing platform for users and developers to find and squash bugs before the final release date of February 9th.