Purple Hammer is native Mac and Windows takeoff and estimating software with live spreadsheets built in.
Live worksheets update automatically from measurements, cost databases and formulas - so quantities, rates, line totals and the whole estimate update as you work with no excel ping pong
PDF markup; calibrated measurements; Power Syntax; Magic Measure and Magic Count; vector and raster snapping; watched-folder document control; version history; auto-align, overlay and blink comparison; PDF, Excel, PNG and GIF export.