I actually liked Picasa more before Google gots its grubby meat hooks on it.
I use Irfanview for viewing/cropping (any screenshots I've shared here, I used Irfanview for) though it isn't really photo management per se.
I would give some thought to whether you want to arrange photos chronologically, by subject matter, by event (trip, vacation, etc.). Some of the photo management software is better at arranging that stuff than others. Some of them save an original copy when you crop, so that your original photos remain intact.
These days I've given up on the whole managing idea. I just lump em under certain date folders in the MyDocuments/MyPictures folder, and backup them up to an external hard drive from time to time. Managing my photos just started to feel too much like a second job.