You can run the listtransaction JSON output through this little python script (save it as jsonTOCSV.py). That will produce csv (comma separated value) output that Excel or Google Spreadsheets can import, both of which can sort by columns (if I recall correctly).

So:

bitcoind listtransactions | jsonTOCSV.py > transactions.csv

#!/usr/bin/env python
#
# Reads an array of JSON objects and writes out CSV-format,
# with key names in first row.
# Columns will be union of all keys in the objects.
#

import csv
import json
import sys

json_string = sys.stdin.read()
json_array = json.loads(json_string)

columns = set()
for item in json_array:
  columns.update(set(item))

writer = csv.writer(sys.stdout)
writer.writerow(list(columns))
for item in json_array:
  row = []
  for c in columns:
    if c in item: row.append(str(item[c]))
    else: row.append('')
  writer.writerow(row)

I am not sure what you mean by sorting, but here is a little python script to check for duplicate txid's:

import json
from sys import argv, stdin

file = stdin.read() #reads transaction list from input
json_file = json.loads(file)

#counts the number of duplicate txid's
txid_list = [transaction["txid"] for transaction in json_file]
print "There are", len(txid_list) - len(set(txid_list)), "duplicates"

Let's suppose that you save this to a file named check_duplicates.py. Now you just need to output the transactions to a file and feed it to the script:

$ ./bitcoind -datadir=1 listtransactions "*" > transactions.log
$ python check_duplicates.py < transactions.log
There are N duplicates

Depending on what you need, other sorting operations can be done. It's easy to manage json with python.

This shell command will show each transaction ID once only, preceded by a count of the number of times it appears. The IDs which occur most often will be at the end:

bitcoind listtransactions '*' 999999 | grep '"txid"' | uniq -c | sort -n