Awlsim is a Step 7 AWL/STL/PLC simulator. It achieves good performance of several tens of thousands of AWL instructions per second. S7-3xx and S7-4xx CPUs (with 2 and 4 accus) are supported.
Groupware that lets you share projects, calendars, files, and email online.
A native runtime library equipped with a Java/JavaScript-like API.