Android (rooted): Xposed, the awesome framework that allows you to roll your own customised version of Android, has finally reached a full, stable version for the newest Android versions. If you weren't willing to take the chance before, now's your time.
While Xposed has been available as a beta for a while, it's always a little risky to run a beta. A beta of a framework that has the capabilities of Xposed is even riskier. You can get the new, stable framework from XDA below.