get the "Configurable Fold Handler" plugin for generic folding.
You specify the fold start and fold end characters easily.

You can further use regular expressions to specify there, or different types such as fold start for {, /*, etc in c++ and fold end for } and */.

You can specify different folding for different file types also, and it has a default folding mode where you have not specified one for a particular file type.

LazyFolds looks like a contender also, you specify the folding in an xml file and can use bean shell scripts in there also. It's not documented very well though and I have not got it working.


There are others that are specific to a file type, such as Java Fold.