I have Quilt-pro and its great for sizing blocks, filling in blocks with fabric or colours, and then organising into a quilt. It also does a chart to tell you how many of each block are required for a quilt the size you want, and how much fabric to buy.
Has lots of other features too. However, it doesn't have strip piecing charts, although it does tell you how many squares to cut, and how many triangles etc.