Whether you need a website where you can find good designers to design a leaflet for you, or you want to design a leaflet for your business, I think you may make a shoot on witmart.com. You know good designers are easy to find, but what you want is custom made design according to your own requirement. So you can post a job first and wait for designers. Then you pick your favorite one. That is what you can do here: http://www.witmart.com/p_84286_t_logo-design
The best website design software is Dreamweaver. It requires some HTML knowledge, but is very versatile and you can accomplish anything you want with that software.
There are many websites which provide information about software design. One of the best is www.developerdotstar.com.
You can make a custom flyer or poster on your own computer. Just download the GIMP to design the graphics and Open Office to create the flyer. They are free pieces of software which are quite easy to use.
I would recommend Chief Art or Autodesk for design software. A free software to use is Google's Sketch up.
The best Architectural software to use is obviously AutoCAD. This software does require some training, Although it is definitely the professionals software of choice.
OptiTex fashion design software has been the leading developer of 2D & 3D solutions for fashion. It is the fisrt class software all over the world.
Autodesk makes many software that can do that.
The best graphic design software on the market today is Print Workshop 2009. Design & Print Business Edition from Avanquest is in second place. Publishing Studio-Greenstreet is in third place.
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There does not appear to be any specific brand offering 'inspiration software'. Designer Daily offer software for colour design inspiration and 'Design Your Way' offers letterhead and logo inspirations.
There are several free design software products on the market today. While none are as good as paid software you might want to check Komodo Edit or Aptana Studio.
Web-design software costs vary greatly from free to upwards of $1,000. The website TechRadar compares a number of free, web-design software programs. The software is also available for purchase at many electronics shops including Best Buy.