Embedded Tag Thing allows you to put tags inside your content, wrapped in [tag][/tag] markup; and also allows you to add tags in the content body by including a comma separated list of tags within [tags][/tags] markup.
/plugins/EmbeddedTagThing.zip has the latest version.
Drop the plugin file into your wordpress plugins folder.
Enable the plugin.
– Single Tags
To display a word in a post as a tag, wrap it in [tag][/tag] markup (with square brackets!). When you save the post, it will be added as a tag; and when you view the post, the word will show as a link to the corresponding tag page.
So if your [tag]post[/tag] contained this sentence; the word post would show as a tag link the first time, but not the second.
– Multiple Tags
It is also possible to add a list of tags inside a post that get added as tags, but don’t display in the same manner as single tags.
[tags]monkey, banana, disco[/tags] in a post would add the three tags, monkey, banana and disco to the post; but not show up as tag links when you view the post.