I offer another recommendation for Irfanview, though I'd better warn you if you want to use it for mapping and image editing. All versions from 4.00 forward have nasty bugs when selecting a specific area of an image, where said selection changes in size and area when scrolling or pressing random keys; I went back to 3.99 until it gets fixed because it made mapping impossible to me.
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"With the first link, the chain is forged. The first speech censored, the first thought forbidden, the first freedom denied, chains us all irrevocably." [...] The first time any man's freedom is trodden on, we're all damaged. - Captain Jean-Luc Picard
B*tch, meet reality. Reality, meet b*tch. - Me