An unprecedented amount of digital information, appearing on a daily basis, needs to be archived and preserved over long time periods. Such information covers major facets of human activities such as business exchanges and electronic commerce, cultural and social interactions, e-government and legal proceedings, scientific studies and data collections, and even personal data such as digital photos and videos. It has been widely recognized that digital preservation is in general a very challenging process that requires innovations in institutional and business models, technology infrastructure, and social and legal frameworks.In this paper, we will report on some of the core archiving and preservation tools and services that we developed under a general technology framework called ADAPT-Approach to Digital Archiving and Preservation Technology. The ADAPT model is based on a layered, digital object architecture that includes a set of modular tools and services built using open standards and Web technologies. These tools are designed so that they can easily accommodate new standards and policies while gracefully adapting to the underlying technologies as they evolve. In particular, we will briefly describe our tools to (1) proactively audit and ensure data integrity over the lifetime of an archived digital object, (2) enable compact storage and fast access to large scale Web archives, and (3) manage ingestion workflows under a wide variety of environments. Most of these tools are currently being used to support the digital preservation environment of NDIIPP institution contents through the Chronopolis project.