StupidZombie is a tool that can be used to "ping" several directories to notify then about a blog update. It does not need to be run from a Web page like Blogger or Wordpress. You can run StupidZombie from a cron job or using Java WebStart. Also, StupidZombie has a simple tag generator from directories that support it.
tagls is a tool that matches file names using boolean expressions made of tags and regular expressions. It handles searching in file lists with word boundaries for "tags", stemming and synonym expansion for both tags and regular expressions, and boolean expressions over lists of tags or regular expressions. It can match against either the file name or the file's content. The output can be unsorted, sorted by name, or sorted by relevance.