What are some industry essential open source packages for building APIs a developer must know?

<p>I am trying to enter the professional golang world and I have been learning the language on my own for a while. I making some progress in learning how to use golang for building API and using variety of packages like gorp, gorrilla mux, negroni and some others. I would like to make sure I have some experience with the most widely used packages before I start seeking a job.<br/> Thanks in Advance. </p> <hr/>**评论：**<br/><br/>tv64738: <pre><p>None of the ones listed are required, and listing those as your &#34;skills&#34; would be negative if I was reading the resume. IMHO you&#39;re better off learning actual Go better.</p> <p>Let me put it this way: if you know <a href="http://gopl.io/" rel="nofollow">http://gopl.io/</a> front to back, are a decent programmer regardless of language, and have never ever touched gorp/gorilla/negroni/whatever, and you don&#39;t get hired, it&#39;s their problem not yours, and you&#39;re better off working somewhere else.</p></pre>monkey_that: <pre><p>+1 to this.</p> <p>For s while now, when people ask a question &#34;Should I learn A or B?&#34;, Go community answers &#34;Learn standard library&#34;. </p> <p>The issue is that you want to learn the language, not the library. When you know the language well, you can learn and understand any third party library. You don&#39;t want to be in a situation where the only way you know how to interact with database is trough gorp, when gorp isn&#39;t option to be used.</p></pre>