HOWTO: equivalent yum option to apt-get autoremove

To remove packages that has been installed as dependencies for the package you are removing if they are only needed for that particular package.

a yum plugin must be installed. Otherwise, yum doesn't provide the capability.

yum install yum-remove-with-leaves

Now yum will automatically have the same function as apt-get autoremove.

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more:
yum-changelog is a Yum plugin for viewing package changelogs before/after updating.

Install yum-changelog via:
# yum install yum-changelog

How to use yum-changelog:
# yum update ktechlab --changelog
Loading "changelog" plugin
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
[..]
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package ktechlab.i386 0:0.3-6.fc6 set to be updated
--> Running transaction check

Changes in packages about to be updated:

ktechlab - 0.3-6.fc6.i386
* Wed Nov 22 23:00:00 2006 Chitlesh Goorah - 0.3-6
- Rebuilt due to new gpsim-devel release

By default, this plugin will show the changelogs before the updates. However if you want to make it echo those changelogs after the updates, replace when=pre by when=post in the file /etc/yum/pluginconf.d/changelog.conf