Virtual Math Manipulatives at NLVM
http://nlvm.usu.edu/en/nav/grade_g_1.html

Learn to Read at Starfall
http://www.starfall.com/

K-2 ABC Interactives
http://www.uen.org/k-2interactives/abc.shtml

Global Classroom Interactives
http://www.globalclassroom.org/ecell00/javamath.html

Ben's Interactive Games
http://bensguide.gpo.gov/k-2/games/interactive.html

Internet4Classrooms: Kindergarten Skills
http://www.internet4classrooms.com/month2month.htm

Internet4Classrooms: First Grade Skills
http://www.internet4classrooms.com/skills_1st.htm

Internet4Classrooms: Second Grade Skills
http://www.internet4classrooms.com/skills_2nd.htm

Resources for Primary Grades - Supporting Student Learning with Technology
http://web.rbe.sk.ca/Support/primary.html#2

K12 Station
http://www.k12station.com/k12link_library.html