4 Important Wordpress Plugins wanted

[TheUltimate]

I've got quite a few good wordpress plugins, now I'm looking for 4 more:
1) tell a friend
2) email a friend
3) print the post
4) convert post to pdf

Can somebody refer some relevant sites to me? Thank you

 

[Ataraxy]

http://wp-plugins.net/
http://codex.wordpress.org/Plugins

http://www.google.com/search?hl=en&q=wordpress+plugins&btnG=Google+Search

 

[Matt]

http://dev.wp-plugins.org/wiki/wp-email <--- tell a friend.

Maybe if you shared links to the ones that you've got - people would be more inclined to post =)