We present HashCache, a configurable cache storage engine designed to meet the needs of cache storage in the developing world. With the advent of cheap commodity laptops geared for mass deployments, de- veloping regions are poised to become major users of the Internet, and given the high cost of bandwidth in these parts of the world, they stand to gain signifi- cantly from network caching. However, current Web proxies are incapable of providing large storage capac- ities while using small resource footprints, a requirement for the integrated multi-purpose servers needed to ef- fectively support developing-world deployments. Hash- Cache presents a radical departure from the conventional wisdom in network cache design, and uses 6 to 20 times less memory than current techniques while still provid- ing comparable or better performance. As such, Hash- Cache can be deployed in configurations not attainable with current approaches, such as having multiple ter- abytes of external storage cache attached to low-powered machines. HashCache has been successfully deployed in two locations in Africa, and further deployments are in progress.