Plugin to display someone's twitter tweets

You don’t need a plug-in. Just use this code:

<script src="https://widgets.twimg.com/j/2/widget.js"></script>
<script>
new TWTR.Widget({
  version: 2,
  type: 'profile',
  rpp: 4,
  interval: 30000,
  width: 250,
  height: 300,
  theme: {
    shell: {
      background: '#333333',
      color: '#ffffff'
    },
    tweets: {
      background: '#000000',
      color: '#ffffff',
      links: '#4aed05'
    }
  },
  features: {
    scrollbar: false,
    loop: false,
    live: false,
    behavior: 'all'
  }
}).render().setUser('twitteruser').start();
</script>

Replace twitteruser in the last line with the actual Twitter username of the account whose tweets you want to display.

You can also edit all the hex colours as you wish, of course.

Thanks a lot !! It works well !!!
Do you know the same kind of widget but for a facebook page? I mean to display on my wordpress site everything that gets written onto a Facebook page.

I don’t know whether it’s possible. I suggest you post that question in a separate thread and maybe someone else can help. Good luck.