Kaspars

Use PHP output buffering to extract widget output and store it into WordPress transients for faster retrieval. It also adds a checkbox to widget controls to exclude it from being cached.
It is a quick fix for bad behaving plugins that parse RSS feeds or call remote URLs on every page load.

Widget Output Cache

Improve website performance by caching widget output in WordPress transients.

David Gwyer

wpgoplugins

Displays a list of all the admin pages accessed in your sites admin area. This is updated every time a page in the admin area is accessed. Information displayed includes: admin page accessed, user, and time of access.
This is very useful if more than one person maintains your Blog, so you can see exactly who is accessing the admin pages, what they are doing, and when!
The Plugin has been completely re-written to be fully compliant with WordPress 3.x and address some security issues. In particular the Plugin doesn’t store admin log information in a plain text file any more. It now uses the WordPress options database. There is also a 200 line log limit to prevent the log getting too big.
Other new options allow you clear the admin log, and also prevent the admin log Plugin page from being logged. This helps to prevent the log from being inflated everytime you visit the Plugin options page.
See our <a href="https://wordpress.org/extend/plugins/profile/dgwyer">other Plugins here</a>.

Admin Log

All log entries in one wp_options row... Bad logic

Need to see who is accessing what admin pages? This Plugin logs admin activity, and shows: admin page accessed, user information, and time of access.

Widget Output Cache vs Admin Log