There are lots, but remember BEST is never FREE. It depends what you want to do with it, if its just for adjustments to size, cropping etc. then try Irfanview click here But if you want a more comprehensive program I use Photoshop 7, a great tool that does just about everything.
I'm pleased with my Paint Shop Pro Version 8 which you can get at half price at some retail outlets at the moment, around £50....our local W H Smiths had it on offer last week, and it's often at a discount in PC World. Adobe Photoshop is usually regarded as the beesknees but it's expensive. I also have Irfanview which is free and does the basic stuff well.
Best is sometimes free. Irfan View is hard to beat. I have Corel PhotoPaint and Corel Draw, but I use the free programs Serif PhotoPlus 5.5, DrawPlus 4.0, and Irfan View far more than the paid-for programs.
Best is not necessarily the program with the most features. The majority of users are not professionals. The best tool for the job is just the one that best fits your purpose.
Thanks for all the reply's,i've downloaded ACDSee demo and just been playing around with it.
It look's ok thanks for that nonnie.one further question if i download some of the others programs sugested "if there are demo's or free trials of them" will i have to uninstall ACDSee or will they all be ok on together ?