MPS is free, most source code being available under Apache 2 License.

MPS是免费的，大多数源代码在Apache 2许可下可用。

youdao

Better yet, as Perf4J is fully open source under the Apache 2 license, and the code is fully documented, you can extend it as desired.

更重要的是，Perf4J在Apache 2协议下完全开源，代码都充分文档化，你可以随意扩展。

youdao

FlexMonkey itself is licensed under the Apache 2 license, which basically means you can modify the source and redistribute it as part of other open source or commercial products.

FlexMonkey本身基于Apache 2许可，这意味着你可以修改其源代码，并将其作为其它开源或商业产品的一部分。

youdao

It is open in the sense that the code is freely available and tweakable under a liberal Apache 2.0 license.

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