Dave Keck's Fixins stopped working on Xcode. I've already tried rebuilding with no avail. Anybody found a workaround? (I'm mostly longing for CurrentLineHighlighter and DisableAnimations.)
Related question on another plugin: XcodeColors not working in XCode 5
UPDATE: I've written a longer answer on how to automate upgrading these plugins, Xcode 8 included.
You can get some* plugins to work with Xcode 5 by adding a DVTPlugInCompatibilityUUIDs array into each plugin's Info.plist. Then add a UUID string to this array.
<key>DVTPlugInCompatibilityUUIDs</key>
<array>
<string>37B30044-3B14-46BA-ABAA-F01000C27B63</string>
</array>
To get the UUID, execute defaults read /Applications/Xcode.app/Contents/Info DVTPlugInCompatibilityUUID in console.
* E.g. DisableAnimations and HideDistractions work, while CurrentLineHighlighter invariably crashes Xcode.