SAVIHost

SAVIHost is a little derivate of VSTHost that has been crafted for the sole purpose of automatically loading exactly one VSTi. To do so, savihost.exe has to be copied or renamed to the name of the PlugIn's DLL. If, for example, the PlugIn is called blabla.dll, savihost.exe has to be renamed to blabla.exe. Here, for example, it's PPG Wave 2V.exe:

Note: in Windows XP, you can use the command
  fsutil hardlink create newname.exe existing.exe
to save space on your NTFS-formatted hard disk.

Starting with V1.07, I've added a built-in keyboard bar so that PlugIns that rely on external MIDI input can be tested at ease:

What's that good for?

Well - some people have expressed the desire to run their VSTis as standalone programs in as simple a way as possible. Using SAVIHost, it is a matter of seconds to create an executable for the plugin, which can then simply be invoked by the familiar double-click. No massive sequencer package, no unnecessary overhead.

You can download it here (.zip file, 161K).
You can download a smaller version without keyboard here (.zip file, 144K).
Current version: 1.32 - VST 2.4 + ASIO 2.0 support,  separate .WAV Player/Recorder

H.G.Fortune has written a documentation that you can download here (.zip file, 290K). A bit outdated by now, but nice to have anyway.