Before installaling one of theses addins, you have to install SharpDevelop 4.3.1 (see below).
You have to install SharpDevelop release 188.8.131.5229 in order to use SharpWComp 4.x
SharpDevelop 4 and SharpWComp 4.x are using .NET 4 framework.
If it's not available on your machine, you can install this framework with the following packages:
The documentation for SharpWComp 4.0 is not yet available. You would be able to download it when the first release will be available.