Drupal 8 get List of modules programmatically.

To get list of modules programmatically, please use following code:

  $modulesList = \Drupal::service('extension.list.module')->reset()->getList();
  if (! empty($modulesList)) {
    echo "<strong>Modules List:</strong>";
    echo "<br/>";
    foreach ($modulesList as $moduleName => $moduleObj) {
      echo "<br/>";
      echo '<strong>Machine Name: </strong>' . $moduleName;
      echo "<br/>";
      echo '<strong>Humand Readable Name: </strong>' . $moduleObj->info['name'];
      echo "<br/>";
      echo '<strong>Description: </strong>' . $moduleObj->info['description'];
      echo "<br/>";
      echo '<strong>Package: </strong>' . $moduleObj->info['package'];
      echo "<br/>";
      echo "-----------------------------------------------------------------";
    }
  }

Output:

Modules List:

Machine Name: action
Humand Readable Name: Actions
Description: Perform tasks on specific events triggered within the system.
Package: Core
-----------------------------------------------------------------
Machine Name: aggregator
Humand Readable Name: Aggregator
Description: Aggregates syndicated content (RSS, RDF, and Atom feeds) from external sources.
Package: Core
-----------------------------------------------------------------
Machine Name: automated_cron
Humand Readable Name: Automated Cron
Description: Provides an automated way to run cron jobs, by executing them at the end of a server response.
Package: Core
-----------------------------------------------------------------
Machine Name: ban
Humand Readable Name: Ban
Description: Enables banning of IP addresses.
Package: Core
-----------------------------------------------------------------
Machine Name: basic_auth
Humand Readable Name: HTTP Basic Authentication
Description: Provides the HTTP Basic authentication provider
Package: Web services
-----------------------------------------------------------------

......