looking for sound and music production, step sequencer programmes

[Han <bali@mango.zw>]

hello

am looking for a step sequencer for linux simmilar to fruity loops on
windows and other music and song production software that can replace
what i used to use in windows

anything to replace: Sony Soundforge
                                 Reason
                                 Fruity loops
                                 Ntrack

please help in anyway you can.