MetalScroll is an alternative for RockScroll, a Visual Studio add-in which replaces the editor scrollbar with a graphic representation of the code. Compared to the original, this version has a number of improvements:
double-clicking the scrollbar brings up an options dialog where the color scheme and various other things can be configured.
the width of the scrollbar is configurable.
the widget at the top of the scrollbar which splits the editor into two panes is still usable when the add-in is active.
you must hold down ALT when double-clicking a word to highlight all its occurrences in the file. RockScroll highlights words on regular double-click, which can be annoying when you actually meant to use drag&drop text editing, for example when dragging a variable to the watches window. People who prefer the old behavior can disable this in the options dialog.
pressing ESC clears the highlight markers.
lines containing highlighted words are marked with 5x5 pixel blocks on the right edge of the scrollbar, to make them easier to find (similar to breakpoints and bookmarks).
multiline comments are recognized.
hidden text regions and word wrapping are supported.
it works in split windows.
middle-clicking the scrollbar shows a preview of the code around the clicked line
it's open source, so people who want to change stuff or add features can do so themselves.