My first WP plugin that (by default) adds excalamation sign [!] to the recent posts, in fact posts not older than (by default 7) xx days.
This is my first WordPress plug-in and is intended to mark new or fresh on blog and thus have visitors attention to it. What is fresh post and what is old it depends from blog to blog. Someone make posts every hour, every day and someone every week. Plug-in provides option to change number of days to consider posts fresh/new. I did not look if there is plug-in that does similar or same thing, i just made this one.