Cream butter in a large mixing bowl; gradually add sugar, beating until light and fluffy. Add egg and orange rind; beat well. Sift together flour, baking powder, and salt in a medium mixing bowl; add to creamed mixture, mixing well.
Press dough from a cookie press onto ungreased cookie sheets, making 3-inch long cookies. Bake at 400° for 5 to 7 minutes. Remove cookies to wire racks, and cool completely.
Place chocolate in top of a double boiler; bring water to a boil. Reduce heat to low; cook just until chocolate melts. Remove from heat, and cool slightly. Gradually add whipping cream to melted chocolate, stirring until well blended.
Dip ends of cookies in chocolate, covering 1/2 inch on each end. Sprinkle ends with pecans, coconut, or colored sugar. Cool cookies on wire racks until chocolate is firm.