At this point, Android's notification system is pretty elegant. But there's no way to avoid confusion (and for some users, frustration) when a ton of notifications come in all at once. Echo Lockscreen attempts to fix that with a lockscreen replacement that puts your current notifications front and center, then organizes them by app or urgency. Currently Echo is in alpha testing, and it's a free download in the Play Store.
Android's lock screen hasn't really changed since 4.2, but app developers keep coming up with new ways to wow us. Case in point: Cover. This alternative lockscreen replaces the default screen with a selection of quick-launch app icons, not unlike some of the manufacturer skins out there. But unlike TouchWiz or Sense, Cover automatically learns which apps you use at what times, and it comes with a ton of impressive UI features.
When it comes to beautifying your phone, most of the options involve complicated modding procedures, installing sketchy software, or spending entirely too much time shuffling through configuration screens. Sometimes, all we need is a low maintenance option that does the hard work for us. To that end, Sparky Lock Screen is determined to deliver an ultra-fast, incredibly simple lock screen replacement that looks great without making you work for it.
Simplicity is obviously the driving force behind Sparky.
Looking to spruce your lockscreen up a bit? The MIUI Team is bringing a new flavor to the lockscreen arena, simply called MiLocker.
MiLocker looks to compete with offerings such as WidgetLocker and GO Locker as your lockscreen replacement, and after spending just a few minutes with it, I can say that it's quite nice - enough so that it will most likely become my primary lockscreen replacement (at least for a while).