Axel's Sinfest RSS Generator
Their RSS feed is stale since their site got a new design around the 8th of June 2014.
By default it generates an RSS feed for the past 7 days and fetches all titles from the website for that.
Plugin for Liferea and Snownews
The script can be used as command-type source in Liferea, as 'Execurl' type plugin in Snownews, or in any other RSS feed reader with the capability to call an feed-generating program instead of an URL.
Actually it was written for exactly that purpose. I use it with Liferea.
-n: Don't download anything from the Sinfest website, just generate a feed with dummy titles.
-d <number>: Generate a feed for the past days.
Setting this value high enough for one run may give you all feed entries you missed since 8th of June 2014.
But remember to do this only once as it fetches every page for every day since then per run to get the comic title for that day. You may get banned if you do that too often.
Copyright (C) 2015 Axel Beckert
- It maybe a nice feature to also support a CGI mode. If so, it should be possible to run it without CGI.pm installed.