Is there any software/website where I can browse for extinct species? It must be based on real animals that are now extinct. It may be in animated versions.
1$\begingroup$ What research have you done so far? $\endgroup$– MattDMoJun 15, 2016 at 13:56
1$\begingroup$ In your next post please start sentences with a capital letter, and use a capital for 'I'. I have corrected this for you. $\endgroup$– DavidJun 15, 2016 at 15:51
You can search for species that are "Extinct" or "Extinct in the wild" at the IUCN red list website (International Union for Conservation of Nature and Natural Resources). That list currently includes 903 species, but some of the assessments might be obsolete (see annotations). From that list, you can click and get some basic information about each species.
Also note that many countries have regional Red Lists, where you can find information about regionally extinct species (i.e. species that have gone extinct in a particular country). For instance, 209 species are labelled "reginally extinct" in Sweden (http://artfakta.artdatabanken.se/, site only in Swedish), most of them insects, while still being present in other parts of the world.
fileunderwater's answer is probably the most accurate. I just wanted to add that, depending on your needs wikipedia > lists of extinct species can be a decent source of information.