Picasa is my favourite app and I useit in my p.c. in picasa I can see all the immages in p.c at one place and its quite useful for me. in picas I cant photoshop my images also here. when I want to print any image I just go here and click on print and it automatically converts in black and white image and gives faster print. I can edit the mages in this softwae which is good and can also give backgrounds to images. thats it its very goods which is helpful for me .