This will build a github markdown table of all the plugins on a site.

build-markdown-table-of-plugins.php

<?php

include( 'the/path/to/wp-load.php' );

if ( ! function_exists( 'is_plugin_active_for_network' ) ) {
	require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
}

$updates = get_site_transient( 'update_plugins' );

if ( ! $updates ) {
	wp_update_plugins();
	$updates = get_site_transient( 'update_plugins' );
}

$headers = array(
	'Slug',
	'Active',
	'Version',
	'Repo Version',
	'Repo Or Custom URL',
);

echo '| ' . implode( ' | ', $headers ) . " |\r\n";
echo '| ' . trim( str_repeat( '--- | ', count( $headers ) ) ) . "\r\n";

$plugins = get_plugins();

foreach ( $plugins as $file => $data ) {
	echo '| ';
	foreach ( $headers as $header ) {
		switch ( $header ) {
			case 'Slug':
				echo strpos( $file, '/' ) ? dirname( $file ) : $file;
				break;
			case 'Active':
				echo is_plugin_active( $file ) ? 'Yes' : ( is_plugin_active_for_network( $file ) ? 'Network' : 'No' );
				break;
			case 'Repo Version':
				if ( isset( $updates->response[ $file ] ) ) {
					echo $updates->response[ $file ]->new_version;
				} elseif ( isset( $updates->no_update[ $file ] ) ) {
					echo 'Current';
				} else {
					echo 'Not In Repository';
				}
				break;
			case 'Repo Or Custom URL':
				if ( isset( $updates->response[ $file ] ) ) {
					echo $updates->response[ $file ]->url;
				} elseif ( isset( $updates->no_update[ $file ] ) ) {
					echo $updates->no_update[ $file ]->url;
				} else {
					echo $data['Plugin URI'];
				}
				break;
			default: 
				echo $data[ $header ];
				break;
		}
		echo ' | ';
	}
	echo "\r\n";
}