diff --git a/linkcheck/checker/consumer.py b/linkcheck/checker/consumer.py
index 01983982..39208c2a 100644
--- a/linkcheck/checker/consumer.py
+++ b/linkcheck/checker/consumer.py
@@ -37,21 +37,33 @@ _lock = thread.allocate_lock()
 
 
 def print_tocheck (tocheck):
+    """
+    Print the number of queued URLs.
+    """
     msg = _n("%5d URL queued,", "%5d URLs queued,", tocheck) % tocheck
     print >> stderr, msg,
 
 
 def print_links (links):
+    """
+    Print the number of checked URLs.
+    """
     msg = _n("%4d URL checked,", "%4d URLs checked,", links) % links
     print >> stderr, msg,
 
 
 def print_active (active):
+    """
+    Print the number of active threads.
+    """
     msg = _n("%2d active thread,", "%2d active threads,", active) % active
     print >> stderr, msg,
 
 
 def print_duration (duration):
+    """
+    Print the run time.
+    """
     msg = _("runtime %s") % linkcheck.strformat.strduration(duration)
     print >> stderr, msg,
 
@@ -174,6 +186,10 @@ class Consumer (object):
                 pass
 
     def _abort (self):
+        """
+        Abort checking and send end-of-output message to logger.
+        Private method not disabling exceptions.
+        """
         # wait for threads to finish
         while not self.no_more_threads():
             if self.num_waited > 30:
diff --git a/linkcheck/checker/ftpurl.py b/linkcheck/checker/ftpurl.py
index edd8d1cb..8ea3a63a 100644
--- a/linkcheck/checker/ftpurl.py
+++ b/linkcheck/checker/ftpurl.py
@@ -228,6 +228,7 @@ class FtpUrl (internpaturl.InternPatternUrl, proxysupport.ProxySupport):
             ftpcmd = "RETR %s" % self.filename
             buf = StringIO.StringIO()
             def stor_data (s):
+                """Helper method storing given data"""
                 buf.write(s)
             self.url_connection.retrbinary(ftpcmd, stor_data)
             self.data = buf.getvalue()
diff --git a/linkcheck/checker/pool.py b/linkcheck/checker/pool.py
index e623aba7..7aa018a4 100644
--- a/linkcheck/checker/pool.py
+++ b/linkcheck/checker/pool.py
@@ -21,6 +21,9 @@ Store and retrieve open connections.
 import time
 
 class ConnectionPool (object):
+    """
+    Connection pool class, storing a set of connections for URL retrieval.
+    """
 
     def __init__ (self):
         """
diff --git a/linkcheck/checker/urlbase.py b/linkcheck/checker/urlbase.py
index 4154c6c2..b8e86c06 100644
--- a/linkcheck/checker/urlbase.py
+++ b/linkcheck/checker/urlbase.py
@@ -101,6 +101,9 @@ class UrlBase (object):
         self.scheme = url.split(":", 1)[0] or "file"
 
     def reset (self):
+        """
+        Reset all variables to default values.
+        """
         # self.url is constructed by self.build_url() out of base_url
         # and (base_ref or parent) as absolute and normed url.
         # This the real url we use when checking so it also referred to
diff --git a/linkcheck/linkparse.py b/linkcheck/linkparse.py
index c4f4fac5..9bc8cec2 100644
--- a/linkcheck/linkparse.py
+++ b/linkcheck/linkparse.py
@@ -148,6 +148,9 @@ class MetaRobotsFinder (TagFinder):
 
 
 def is_meta_url (attr, attrs):
+    """
+    Check if the meta attributes contain a URL.
+    """
     res = False
     if attr == "content":
         equiv = attrs.get_true('http-equiv', u'').lower()