The Best for Two Decades!
Since 1991, ST-Developer has been the most reliable, best performing, easiest to use, and most broadly supported SDK for STEP Application Protocols, STEP-NC, Industry Foundation Classes, or CIMsteel CIS/2!
NEW! — ST-Developer v16 Beta Program
ST-Developer v15 Features:
- Read STEP Part 21 files 2-3 times faster, and use 17-20% less memory!
- New Merged CAD Library -- One library that covers the original AP203, AP203e2, AP214e3, and the most recent version of AP242. Your programs can read files from any AP and switch between APs when writing.
- New UTF-8 international character set support.
- The ST-Viewer is now multi-threaded, so files now display in a fraction of the time.
- Significant updates to the IGES conversion library in response to testing by a major CAD vendor.
- Added shared library support for MacOS X and Linux.
- See what else is new in ST-Developer v15!