NIPrint
- A bi-directional 32-bit LPD/LPR print services for Winsock.
- http://www.netinst.com/products/niprint.html

HP Web JetAdmin
- Web-based solution for remotely installing, monitoring, and troubleshooting network-connected peripherals. The software's Web browser interface simplifies management of a wide range of devices, including HP and non-HP printers.
- http://h10010.www1.hp.com/wwpc/pscmisc/vac/us/en/en/network_software/wja_overview.html

COSprint
- A print spooler and output management package for Unix and Windows, certified for use with SAP R/3.
- http://www.cosprint.com/

LPRng
- Print Spooler
- http://www.astart.com/lprng.html

TROY XCD, Inc.
- Network and Internet Connectivity including Print Servers, Serial to LAN, and Internet Printing.
- http://www.troyxcd.com

Brooks Internet Software - Global Printing Solutions
- A PC-based TCP/IP print server (LPD) for Windows NT platforms that enables users to effortlessly receive customized print jobs from an AS/400, mainframe, or Unix system. RPM offers localized network printing control and flexibility including custom format
- http://lpd.brooksnet.com/

Network Printing Solutions for Windows platforms
- Business-oriented software products bridge the network-printing gap between AS/400, Unix, mainframes and Windows printers offering network and remote/home office users control normally lost with TCP/IP printing.
- http://www.brooksnet.com

Printer Working Group
- an unincorporated alliance among printer manufacturers, print server developers, operating system providers and print management application developers chartered to make printers and the applications and operating systems supporting them work together bet
- http://www.pwg.org/

apsfilter
- flexible print filter
- http://www.freebsd.org/~andreas/#apsfilter

SAMBA
- SMB print service
- http://samba.anu.edu.au/samba/samba.html