--- a/ui/CMakeLists.txt	Wed Mar 26 12:07:06 2014 +0100
+++ b/ui/CMakeLists.txt	Wed Mar 26 12:22:24 2014 +0100
@@ -16,6 +16,7 @@
     ${CMAKE_CURRENT_SOURCE_DIR}/mainwindow.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/listupdatedialog.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/helpdialog.cpp
     ${CERTIFICATELIST_SOURCES}
     ${DOWNLOADER_SOURCES}
 )

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/helpdialog.cpp	Wed Mar 26 12:22:24 2014 +0100
@@ -0,0 +1,28 @@
+#include "helpdialog.h"
+#include <QDebug>
+#include <QVBoxLayout>
+#include <QTextEdit>
+#include <QPushButton>
+
+HelpDialog::HelpDialog(QMainWindow *parent) :
+    QDialog(parent)
+{
+    setupGUI();
+}
+
+void HelpDialog::setupGUI()
+{
+    QVBoxLayout *mainLayout = new QVBoxLayout(this);
+    QTextEdit *helpText = new QTextEdit;
+    helpText->setReadOnly(true);
+    helpText->setPlainText(tr("This dialog contains some text to help the user."));
+
+    QHBoxLayout *buttonLayout = new QHBoxLayout;
+    QPushButton *closeButton = new QPushButton(tr("Close"));
+    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
+    buttonLayout->insertStretch(0, 10);
+    buttonLayout->addWidget(closeButton);
+
+    mainLayout->addWidget(helpText);
+    mainLayout->addLayout(buttonLayout);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/helpdialog.h	Wed Mar 26 12:22:24 2014 +0100
@@ -0,0 +1,21 @@
+#ifndef HELPDIALOG_H
+#define HELPDIALOG_H
+
+#include <QDialog>
+#include <QMainWindow>
+/**
+ * @file helpdialog.h
+ * @brief The dialog for help text.
+ */
+
+class HelpDialog : public QDialog
+{
+public:
+    /** @brief Create a help dialog */
+    HelpDialog(QMainWindow *parent);
+
+private:
+    void setupGUI();
+
+};
+#endif // HELPDIALOG_H

--- a/ui/mainwindow.cpp	Wed Mar 26 12:07:06 2014 +0100
+++ b/ui/mainwindow.cpp	Wed Mar 26 12:22:24 2014 +0100
@@ -9,6 +9,11 @@
 #include <QApplication>
 #include <QFile>
 #include <QTimer>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QGroupBox>
+#include <QPushButton>
+#include <QSplitter>
 
 // The amount of time in minutes stay silent if we have
 // something to say
@@ -21,11 +26,13 @@
 #include "certificatelist.h"
 #include "downloader.h"
 #include "listupdatedialog.h"
+#include "helpdialog.h"
 
 MainWindow::MainWindow() {
     createActions();
     createTrayIcon();
     createMenuBar();
+    createContent();
     qRegisterMetaType<SSLConnection::ErrorCode>("SSLConnection::ErrorCode");
 
     connect(mTrayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
@@ -118,6 +125,7 @@
         mCurMessage = tr("An updated certificate list is available. Click here to install.");
         setState(NewListAvailable);
         showMessage();
+        loadCertificateList();
     }
 }
 
@@ -213,16 +221,88 @@
     setMenuBar(mMenuBar);
 }
 
-void MainWindow::showSettings() {
+void MainWindow::createContent()
+{
+    // Create a central widget containing the main layout.
+    QWidget *base = new QWidget;
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    QHBoxLayout *certLayout = new QHBoxLayout;
+    QHBoxLayout *bottomLayout = new QHBoxLayout;
+
+    QGroupBox *certBox = new QGroupBox(tr("Managed Certificates"));
+    certificateList = new QListWidget;
+    connect(certificateList, SIGNAL(itemClicked(QListWidgetItem*)),
+        this, SLOT(showDetails(QListWidgetItem*)));
+    certificateDetails = new QTextEdit;
+    certificateDetails->setReadOnly(true);
+    QSplitter *splitter = new QSplitter(certBox);
+    splitter->addWidget(certificateList);
+    splitter->addWidget(certificateDetails);
+    certLayout->addWidget(splitter);
+    certBox->setLayout(certLayout);
+
+    QPushButton *update = new QPushButton("Search for Updates");
+    connect(update, SIGNAL(clicked()), this, SLOT(checkUpdates()));
+    bottomLayout->insertStretch(0, 10);
+    bottomLayout->addWidget(update);
+    mainLayout->addWidget(certBox);
+    mainLayout->addLayout(bottomLayout);
+
+    // QMainWindow allready has a layout. All child layouts and widgets are
+    // managed in the central widget.
+    base->setLayout(mainLayout);
+    setCentralWidget(base);
+}
+
+void MainWindow::loadCertificateList()
+{
+    qDebug() << "display certificates";
+    certificateList->clear();
+    foreach (const Certificate &cert, mListToInstall.getInstallCertificates()) {
+        if (!cert.isValid()) {
+            qWarning() << "Invalid certificate in list";
+            continue;
+        }
+        QListWidgetItem* item = new QListWidgetItem(cert.shortDescription());
+        item->setData(Qt::UserRole, cert.details());
+        QIcon *certIcon = new QIcon(":/img/tray_22.png");
+        item->setIcon(*certIcon);
+        certificateList->addItem(item);
+    }
+    foreach (const Certificate& cert, mListToInstall.getRemoveCertificates()) {
+        if (!cert.isValid()) {
+            qWarning() << "Invalid certificate in list";
+            continue;
+        }
+        QListWidgetItem* item = new QListWidgetItem(cert.shortDescription());
+        item->setData(Qt::UserRole, cert.details());
+        QIcon *certIcon = new QIcon(":/img/tray_22.png");
+        item->setIcon(*certIcon);
+        certificateList->addItem(item);
+    }
+}
+
+void MainWindow::showSettings()
+{
     qDebug() << "show settingsdialog";
 }
 
 void MainWindow::showHelp()
 {
     qDebug() << "show helpdialog";
+    HelpDialog *help = new HelpDialog(this);
+    help->show();
 }
 
 void MainWindow::showAbout()
 {
     qDebug() << "show aboutdialog";
 }
+
+void MainWindow::showDetails(QListWidgetItem *item)
+{
+    qDebug() << "show details";
+    QString details = item->data(Qt::UserRole).toString();
+    certificateDetails->setPlainText(details);
+}

--- a/ui/mainwindow.h	Wed Mar 26 12:07:06 2014 +0100
+++ b/ui/mainwindow.h	Wed Mar 26 12:22:24 2014 +0100
@@ -10,6 +10,8 @@
 #include <QMainWindow>
 #include <QSettings>
 #include <QMenuBar>
+#include <QListWidget>
+#include <QTextEdit>
 
 #include "downloader.h"
 #include "certificatelist.h"
@@ -49,6 +51,7 @@
     void showSettings();
     void showHelp();
     void showAbout();
+    void showDetails(QListWidgetItem*);
 
 private:
     /** @brief check the integrity of available files.
@@ -63,6 +66,8 @@
     void createTrayIcon();
     void createActions();
     void createMenuBar();
+    void createContent();
+    void loadCertificateList();
 
     QString mCurMessage;
     QString mInstalledSWVersion;
@@ -79,6 +84,9 @@
     QMenuBar *mMenuBar;
 
     CertificateList mListToInstall;
+
+    QListWidget *certificateList;
+    QTextEdit *certificateDetails;
 };
 
 #endif // MAINWINDOW_H