Button addons.

You can include it in a class="input-group".

                    <!-- Example 1 -->
<div class="input-group">
    <span class="input-group-btn">
        <button class="btn btn-default" data-icon="glyphicon-map-marker" role="iconpicker"></button>
    </span>
    <input type="text" class="form-control" value="My marker">
</div>
<!-- Example 2 -->
<div class="input-group">
    <input type="text" class="form-control" value="My house">
    <span class="input-group-btn">
        <button class="btn btn-default" data-icon="glyphicon-home" role="iconpicker"></button>
    </span>    
</div>