I love using the software Kidspiration in my classroom. It is a great piece of software to create graphic organizers for stories or for concepts we are studying in science and social studies. Students are able to design their own web to show their understanding of a concept (and even elaborate on points, as well). In addition to creating a web to organize their thoughts, they can add graphics and change the text and colors to stand out.
Another awesome use of Kidspiration is for math. The software comes with a large number of pre-made mathematics activities. Some of the wonderful activities include: fractions (equivalent, adding/subtracting, mixed numbers to improper), story problems, multiplication, division, and measurement. All of the math activities have manipulatives that are extremely elementary-friendly! The students absolutely love using the software – it is easy to use and helps them learn!