cFosSpeed also reduces network congestion for downloads by lowering the TCP window size to keep the sender from sending too much data at once. In addition, cFosSpeed contains a packet filter firewall, time and volume online budgets, a skinnable transfer monitor and several other special purpose features. It has a filter language that allows experts to write their own traffic classifications.

Improve your Ping for online games
Keep your internet fast during heavy upload/download
NEW: Improve mobile Internet
Reduce audio/video streaming problems
Improve VoIP speech quality

cFosSpeed supports a wide variety of connections, like DSL, ADSL, VDSL, Cable, Modem, ISDN, Mobile (GSM, GPRS, HSCSD, UMTS, HSDPA), File sharing (P2P), Online Games, VoIP, Streaming Media, and Tuning. You can use cFosSpeed with a router and/or a DSL-modem or cable-modem. With cFosSpeed improve your Ping for online games, keep your internet fast during heavy upload or download, improve mobile Internet, improve VoIP speech quality, and reduce audio/video streaming problems.

Highlights:
cFosSpeed prevents one application (e.g. sending email) from choking all others, like telephone calls, chat, etc.
cFosSpeed keeps your ping times low, so you can play online games and download files simultaneously.
All important data packets are automatically prioritized over unimportant ones. With the cFosSpeed program and protocol prioritization you can configure your applications ideally and/or add new Programs.
Real-time analysis of your data: With the new status window you can easily recognize which data streams you are currently transfering.
cFosSpeed runs with DSL, Cable, WLAN, CDMA2000, UMTS, WCDMA, Modem, ISDN, broadband mobile (2G / 3G).
Here a detailed explanation of cFosSpeed’s Traffic Shaping.