MoreLINQ

I just stumbled across this - a very useful extension LINQ library called MoreLinq.

The list of extensions that it provides includes some real gems:

• MaxBy (or MinBy) - scan a sequence and return the item with the highest (or lowest) value as identified by a delegate.
  This differs from Max (or Min) by returning the item from the sequence, not the value itself.
• ForEach - this exists on List<T> but isn't supplied by default.
• Pipe - applies a delegate to each item of the sequence, without modifying the sequence

The project includes lots more - check out the MoreLinq project home page, the list of operators, or go straight to the download page.