Lists images (i. e. files ending with ".jpg", ".gif" or ".png") in current
directory.
+: **linenr()**
+Prints specified range of (numbered) lines of a file.
+Usage: linenr <start>[,<end>] <file>
+
: **makereadable()**
Creates a PostScript and a PDF file (basename as first argument) from
source code files.
: **vman()**
Use vim(1) as manpage reader.
+: **whatwhen()**
+Searches the history for a given pattern and lists the results by date.
+The first argument is the search pattern. The second and third ones are
+optional and denote a search range (default: -100).
+
+: **weather()**
+Retrieves and prints weather information from "http://weather.noaa.gov".
+The first and only argument is the ICAO code for the desired station.
+For a list of ICAO codes see
+"http://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code".
+
: **xcat()**
Tries to cat(1) file(s) given as parameter(s). Always returns true.
See also xunfunction() below.