Johann Gottlieb Fichte is one of the major figures in German philosophy in the period between Kant and Hegel. Initially considered one of Kant's most talented followers, Fichte developed his own system of transcendental philosophy, the so-called Wissenschaftslehre. Through technical philosophical works and popular writings Fichte exercised great influence over his contemporaries, especially during his years at the University of Jena. His influence waned towards the end of his life, and Hegel's subsequent dominance relegated Fichte to the status of a transitional figure whose thought helped to explain the development of German idealism from Kant's Critical philosophy to Hegel's philosophy of Spirit. Today, however, Fichte is more correctly seen as an important philosopher in his own right, as a thinker who carried on the tradition of German idealism in a highly original form.

http://www.iep.utm.edu/f/fichtejg.htm
http://plato.stanford.edu/entries/johann-fichte/