Prioritizing empty TCP ACKs with pf and ALTQ
An OpenBSD-specific way to relieve TCP performance degradation due to congestion in the opposite direction across a bottleneck.
http://www.benzedrine.cx/ackpri.html
Sally Floyd at ICIR
Proposed and experimental improvements to congestion control.
http://www.icir.org/floyd/
T/TCP Home Page
Historic description of T/TCP. Includes links to RFCs and source code. Not being updated since Richard W. Stevens has passed away.
http://www.kohala.com/start/ttcp.html
TCP Smooth Start
A refinement to slow start algorithm.
http://www.eecs.umich.edu/~hxw/paper/smooth.ps
TCP/IP Resources List
A meta-FAQ about TCP/IP regularly posted to Usenet.
http://www.private.org.il/tcpip_rl.html
TCP: From PSH to ACK
Concise descriptions of the different algorithms involved in implementing TCP.
http://cities.lk.net/tcp.html
TCPSAT list of TCP papers
A list of pointers to author's copies of TCP-related papers from (now closed) IETF TCP Over Satellite working group.
http://www.isi.edu/tcpsat/papers.html
The Web 100 Project
The goal is to make 100Mbps TCP streams over wide-area networks possible for general users.
http://www.web100.org/