Note: All sites are anonymous.

• IBM's Service Repository
  This is the main site for all Corrective Service Diskettes. APAR's, fixes, IBM Employee Written Software and more. It covers OS/2, DOS, LAN Server and AIX. Read the README files for directory structure and help.
• OS/2 Device Driver Repository
  This site has extensive device drivers, divided into directories according to type of equipment, including an index file. Other files here include movies, information on the Developer Assistance Program and much more. A valuable place to check when looking for OS/2 information and files.
• IBM Networking
  Technical guidance, education and customer case studies. Current and back issues of the APPC Connection, a newsletter distributed in 82 countries. Also technical information on a wide variety of networking-related standards. Press releases, product announcements and technical papers.
• IBM PC Company
  (or at ftp://ftp.pc.ibm.com/) Extensive files on drivers, fixes, etc. for hardware, as well as DOS, OS/2, Netfinity, Employee Written Software and other product information and drivers. A must site to check frequently.
• IBM Internet Connection
  The Advantis FTP site contains all the IBM Internet Access Kit software, as well as other Internet programs, game information, an incoming directory for user uploads and more.
• Service Repository
  Mainly AIX, AS400 and S/390 files here, but lots of other goodies hiding in those directories.