Haystack is a designer's tool. Designed to be integrated directly into your own Notes application, it allows for easy turnkey full-text searching solutions across multiple NSFs and even multiple servers. More importantly, it allows the developer to attach processes to the user's selected document set within the search results, so literally any Lotuscript process can be performed against the selected results, just like a normal Notes view.
This project is released under the Lesser GPL. Use it any way you like, just attribute credit.