Network Tuner (Free)

[Isair]

Since there is no workaround to set sysctl variables without administrative rights I decided to make my application called "Network Tuner" free instead of making it a $0.99 application available on Mac App Store.

Link: http://www.barissencan.com/downloads/network-tuner/

Program description from my website:

Network Tuner helps you tune your network performance by making small optimizations according to your connection type. With this lightweight utility you can increase your LAN and WAN transfer rates and reduce your connection latency. If you are worried about the changes made to your system then you will be relieved to know that settings changed by Network Tuner are automatically reset to their system defaults upon rebooting your Mac.

• Disables the delayed ACK algorithm to reduce latency.
• Increases the maximum segment size to an optimized value.
• Increases the buffer size for received/sent packets to an optimized value.

Does not run on PPC Macs.