Senderella is a free VST plug-in for Windows that can transmit stereo/mono signals from one instance to another. Use it as a send in hosts that do not provide proper sends, or for feedback loops in modular hosts that do not support them. It has just been updated to v1.0.6.

There are now two versions of the DLL included: Original and Simplified.

Original
This has the same parameter map as the original Delphi version (Now C++). it should be completely compatible across projects using the Delphi version (1.05 BETA). There is also a bug fix which resolves audio that could get stuck in the channel buffer when switching channel during playback (creating a buzzing noise). It opens up one new possibility - you can now automate the channel parameter to stream audio to different sends.

Simplified
This version only has two parameters. Mode (Send/Return), and Amount (% signal to send). You should take the simplified version DLL and rename it something like send1.dll. You can make copies of the DLL for each additional send/return you'd like to have available. For example: send1, send2, send3, send4. Each DLL can then only communicate to an identically named DLL. This eliminates the need to use the channels in the original version. It also gives you a nice visual cue.