The first is for the MathForum @ Drexel University. It is hard to describe in a few words everything this site offers to both instructors and students. You can easily spend several hours just looking into everything available, some free, some for a fee. From the "about" page:
"The Math Forum is a leading center for mathematics and mathematics education on the Internet. Operating under Drexel's School of Education, our mission is to provide resources, materials, activities, person-to-person interactions, and educational products and services that enrich and support teaching and learning in an increasingly technological world. Our online community includes teachers, students, researchers, parents, educators, and citizens at all levels who have an interest in math and math education."
The second URL is for the National Library of Virtual Manipulatives. These are java applets that illustrate interactively many basic arithmetic and mathematics concepts. While nominally aimed at K-12, many of the virtual manipulatives are suitable for the skills development course taught in community colleges (College Arithmetic through Intermediate Algebra). Since statistics is commonly taught now in high school, the library also contains several virtual manipulatives (I am particularly enamored of the Monty Hall Problem manipulative) suitable for a college Elementary Statistics course. The Library can be used freely through any Internet connection or can be downloaded for a nominal fee. If you teach any skills development courses or Elementary Statistics, you should be able to find something here to use in the classroom.