I am a chemical engineer working for Eastman Chemical Company. We develop a software tool which we use for chemical process control and simulation. Our software allows users to write scripts to support their simulations and enable custom models or calculations. We were using Microsoft's scripting engine (VBScript and JScript), but we never liked the language and were not impressed with the effort required to expose our object model through the script.
Microsoft appeared to have some bugs in the latest version of their scripting engine, which ships with Internet Explorer. We didn't have control over the distribution of the scripting engine and were having too much trouble making our application work between versions. We started looking for a replacement, and it was looking like we were going to implement Google's V8 engine or Mozilla's SpiderMonkey.... until we stumbled upon AngelScript.
AngelScript has almost everything we need, and the source is very readable. Thanks Andreas!