As all of you might be knowing that distro is a short name for Linux Distributions, here I list many distros which have gained a lot ground of late and can be truly called desktop OS. Some information are also appended along with them so that you can make a nice decision. All comments,suggestion and feedback are welcome.
Ubuntu: This is the best and the most usable Linux distro when it comes to general use. A Linux distribution should not just work properly, it should have a strong community, nice documentation, large number of HOWTOs and TIPS/TRICKS. This is the place where ubuntu beats all distros hands down. If you have problems downloading from the site or have slow connection, you can order its CD for free! Order Now
UbuntuForums: This is one of the most busiest forums and too exhaustive for any one to follow. In light mood its so vast that one needs to be unemployed to keep track of all the threads 😀 Its claims over 6,00,000 users on the community. Even if you post a n00b question, you should expect to get multiple instant replies. One thing special is the patience in community members. The same n00b question is asked again and again by different members and all of them are answered by the people in polite tone. Its a non-geek hangout
Ubuntu Wiki: This is one of the best documentation I have ever seen, one stop destination for all problems and tweaks. The wiki consists of two parts official and community. Official one is a bid narrow thing and to the point explanation whereas community section is highly exhaustive.
openSuse: The community version of the SUSE enterprise Linux. This project is funded by Novell for creating a desktop based OS based on its proprietary SUSE. Its known for its great KDE based glass effects and looks. The latest version is OpenSuse 11.0 which has the latest release of KDE 4.0 bundled in it. Go and have a try.
openSuse Forums: At the time of writing openSuse forums had 2246 members and still had lots of activity going on by having a look at the number of discussions threads.
Fedora: Like openSuse this one is a community Linux project funded by Red Hat to build entirely free Operating system based on its Red Hat Enterprise Linux. It has the same package management and shares many features from its parent except that it doesnt contain any non-free packages or softwares. The latest version is fedora 9 and it has great chances of making its roads inwards to Windows Users.
Fedora Forums: fedora Forums has a total membership of 110,000+ people with over 2.5 million threads and even more posts. Its properly split up into various parts. While posting questions take care to post it in correct section and secondly before posting a question take care to search whether its answered before or not. These care and precaution have to be taken for all community and not just Fedora in general.
Fedora Wiki: This project also have an excellent Wiki as far as I have noticed ( very beautiful too). I found all the stuffs which I required while using it. This project has a large user base and many of them are very committed in promoting this project, so they post all their howtos and tutorials at this place.
Fedora Ambassador: This is a concept started by Fedora to spread its user base. People register themselves as ambassadors and promote its use among the general people who have little tehnical knowhow about Linux and Fedora in general. They assist people in setting up their OS and installing some necessary stuffs like codecs and internet which is totally greek to a newcomer. If you want to contribute to Fedora you can start as an ambassador. Fedora Ambassadors discuss ways to promote it among masses. They post theit updates about the activities and promotional stuff. Highly contributing people can find their places to the top of Fedora development team.