Free up memory in Chromium with a single click
One which has been added recently is the ability to free up memory. Like other browsers, Chrome and Chromium can get a little RAM-hungry after extended browsing sessions. By adding the --purge-memory-button switch to your command line, you'll get exactly that -- a purge memory button on the Task Manager screen.
Once you've made the change, your shortcut's target should look like this (on Windows, of course):
C:\Users\[username]\AppData\Local\Chromium\Application\chrome.exe --purge-memory-buttonPress shift + ESC after you've been browsing for a little while in Chromium top bring up the task manager. Press the purge button, and you'll notice several of your memory figures drop (some quite drastically).
This is a fairly recent addition to the Chromium nightly builds, so it has yet to arrive in the developer or beta versions of Chrome. Keep your eyes peeled, though - it's sure to arrive soon, at least on the dev channel.