Complex sentence: JetBrains's flagship product is IntelliJ IDEA, an IDE for JVM-based and polyglot development, they also offer an extended family of IDEs for Java, Ruby, Python, PHP, Objective-C and other languages.
Split into simpler sentences: JetBrains's flagship product is IntelliJ IDEA, an IDE for JVM-based and polyglot development. The company also offers an extended family of IDEs for Java, Ruby, Python, PHP, Objective-C and other languages.