Project 64 1.7
I've included both the latest official (1.7.0.49), and the notorious unofficial 1.7.0.55 Build 4 here. If you want more information on which you wish to use see this forum post: http://forums.ngemu.com/project-64-discussion/102093-regarding-project64-1-7-0-55-a.html.  Personally I use .49 but it's up to you whether or not you trust the unofficial build.  Two reasons why it's up here, 1) the official site has totally neglected to do anything about their "donate to download" policy gone wrong, and 2) I keep losing the .rar file so I put it here so that stops happening :)

Download
Project 64 1.7.0.49 - 2.84MiB
Project 64 1.7.0.55 Build 04 - 6.11MiB
Source: http://www.crimsonrain.com/2007/09/project64-17055-build-04.html (blame them not me if you have problems ;))

You will need something like WinRAR to extract these.



Here are some virus reports from some files included in the unoffical build, you make up your mind whether it's safe or not.
- Project64_1.7.0.55.exe (Installer)
http://www.virustotal.com/analisis/0eabd758254544091fdcc4fb4e46e626
- Project64.exe
http://www.virustotal.com/analisis/201b2a7c40406e46b948e96c64b361ba
- Project64k.exe
http://www.virustotal.com/analisis/414804001c80d335ef2339c41ed4d3a6