Bandwidth Controller Standard   
http://bandwidthcontroller.com

Bandwidth management and traffic shaping software for Windows 2000 and XP. Take control of your network traffic by limiting the data rates of all traffic flowing through your server. No client software needed.

GateWall   
http://usergateproxy.com

GateWall proxy server is a fully-fledged Internet management tool for providing local network users with Internet access using only one Internet connection. It provides centralized administration of all connections, utilized bandwidth and time users spend online; it automates calculations of consumed traffic, billing and Internet usage reporting. GateWall provides a flexible network control by automating connection, work schedule, billing, traffic calculation and other routines with the help of "rules" - predefined scenarios. For example, without any human intervention, the program can shift the user billing plan from regular to special one, based on the web addresses visited, date, or specified time; it can restrict Internet access based on the users time online, traffic limits for a day or month, IP-addresses, URL strings, or specified traffic speed limits. The administrator can view a detailed status of active session for each user - including IP address, user name, bytes sent or received, and visited URLs. By setting URL filtering policies, the administrator can restrict the user access to irrelevant websites, set up ad-filters and expose company bandwidth abuse. GateWall can send users emails with detailed Internet usage statistics at regular time intervals. GateWall includes statistics module that allows making various reports on Internet usage and exporting them to MS Excel format. Among other useful features there are: Network Address Translation (NAT), various user authorization methods, port mapping (allows traffic to be redirected from one port to another), resource publishing (provides Internet access to local network resources), HTTP resources caching, remote administration, and many others. Featuring an intuitive, well-designed interface, GateWall can be used by beginners as well as advanced users. GateWall supports HTTP, FTP, POP3, SMTP, IMAP4, Telnet, IRC, NNTP, ICQ and all other protocols over UDP/TCP. FREE 30-Day trial is available.

Berkeley Packet Monitor   
http://homepage.mac.com

Berkeley Packet Monitor is a Mac OS X network traffic monitoring and diagnostic utility.

Junk Mail Remover   
http://www.10-strike.com

Delete junk mail (spam, virus, trojan, and e-mails with big attachments) fast and easily. If your connection is slow (dial-up, GPRS, etc) or you have to pay for internet traffic, this program will save your time and money. Junk Mail Remover connects to your mail POP3-server and downloads all headers or headers of large messages only. You can analyze message attributes (sender, recipient, subject, size) and decide which e-mails are needless. Then you mark them for deletion and the program removes marked messages from mail server. Filters and SpamAssasin support can help marking messages automatically. After this you can download remaining messages which are clear from viruses, huge attachments, and other junk. Program features: Ability to remove junk, spam, and virus messages right on your POP3 server with no risk of infection. White and black lists for automatic deletion. SpamAssasin support. Keep alive connection support. Low traffic consumption.

MaaTec Network Analyzer   
http://www.MaaTec.com

Network Analyzer / Packet Sniffer with easy to use filtering and intuitive GUI. Online view of incoming packets. Real-time network statistics that are displayed in a table. You can select a column that will be sorted in real-time, too. Numerical values can be displayed as text or bar graph. Boot-free installation possible (see website for details). Different options to color displayed packet data. Multiple views with different packet filters and statistics possible. Huge number of presentable network statistics values. All settings can be saved to disk or into the convenient 'Quick Load' list for fast access. Award-winning online help. Supports multiple network cards in one or multiple windows. Tested on multi-processor machines. Dump packet information with different detail levels. Unique new packet information display in vertically splitted window. High performance due to assembler optimization and genuine new packet filter design. Decodes currently following protocols: IPv4, IPv6, TCP, UDP, IPX, PPP, PPPoE, ICMP, ICMPv6, IGMP, LCP, CHAP, CCP, ARP, RIP, IPX-RIP, DNS, DHCP, bootpc, bootps, NetBIOS, NetBIOS-NS, SMB/CIFS, Microsoft-DS, NMPI, LLC, ITU-T X.233 CLNP, X.224 TP, ISO 9542 ES-IS, ISO 10589 IS-IS, Telnet, TFTP. And as text-decode: HTTP, FTP, POP2, POP3, IMAP, IMAP3, MSNP, NNTP, SMTP, SSDP. Statistics can display all common network protocols.