The best replacement for makerware is replicatorg.

The best alternatives to makerware are rated as following:
★★★★★  replicatorg
★★★  slic3r
★★  skeinforge
★  sailfish

Your alternative for makerware is not listed? Suggest!
Speaking about makerware, one probably shouldn't forget about flashforge.

Other search terms related to makerware and their ratings are:
★★★★★ flashforge
You have in mind a companion for makerware and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of makerware in all years. Click on graph for more.
makerware
replicatorg
slic3r