QuoteFix is a plug-in for Apple Mail which enables "bottom-posting": instead of replying above a message (as Apple Mail does by default), it will place the cursor below the original message when you reply to, or forward, a message.

Other features include:

• removing the senders signature from the reply
• customized attributions (including HTML and templating)
• and generally cleaning up replies/forwards so your messages will look good, clean and spiffy

Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.