Another add-in worth mentioning: this one will take a structure with R-Groups (Markush) or S-Groups (polymer repeat units/chain length, needs to use generic brackets with a data s-group named "REPEATRANGE") or both and enumerate to a choice of Draw canvas, or SDFile or Excel sheet. The enumeration uses Cheshire and is very fast.
Here's a combination enumeration example:
Example enumerations are supplied with the add-in.
Here it is in action:
If you have a colleague who might be interested in this add-in or if you are interested in trying it yourself: please drop me a line at james.jack@3ds.com.