Pecasa is a great free software. Try it.
You do not need cameras software to download pics from your camera, btw. Just plug in your camera to USB port and it shows as an external DRIVE or USB STORAGE device in your MYCOMPUTER folder. Just click on its drive letter and you are looking at your cameras memory.
Click on the folder called DCIM and then subfolder(s) named depending on camera model. For Panasonic it is 100_PANA for example. Click on this and here is your pics. View, Drag and Drop, Delete, etc any pic just as if it was already on your computer.
To down load all pics, Drag and Drop (or cut and paste)the whole pic folder (100_PANA for example) to a location on your computer, as \Documents\Pictures. To delete all pics on camera, right click on pics folder and delete 100_PANA folder. or folder where your pics show up on your camera.