3rd Party Extensions to Flash Drawing Tools

Hello all…
I was wondering if there are any third party extensions to the drawing features in flash? I find them more intuitive and quicker than other vector programs…but I still feel they are underdeveloped…I was wondering if there are any third party programs that might extend them in flash? some features such as a better midpoint detection, or offsetting, pressure sensitive brush, construction lines would really help what I do with flash. Anyone have any ideas or another vector drawing program they might recommend that functions similar to flash