What are the best coverings for a cement floor?

http://www.garageremodelguides.com/garage-conversions/flooring-options-garage-conversions/

I did a primer, painted then stained and sealed method. In my whole house. It looks great kinda like acid stained wit out the cost and could do it my self

i used a primer from lowes a Valspar- stainblocking Bonding primer / sealer

then painted w Valspar Duramax- exterior satin, a tan color paint. Then i used Behr semi transparent concrete stain (not the dye)- color gas to be made - used the darkest- something like Loden, to get the multi color - i rolled on & once it was partly dry i did a second time in random pattern - carefull its dry enough not to pull off the color you 1st put down.

when all done i did a polyurathane for floors over top, 2 coats

I saw it done on a post several years ago.

If your slab is in good shape & a pretty much the same all over, you maybe able to skip the prime & paint - I had all kinds of over spray on the slab from them painting the walls and had to scrape up all the glue marks from the carpet padding - so i did the paint to give me a blank slate to start with

Have you thought about a cork floor? Softer and warmer to stand on.