So it appears that there are numerous apps and games on sale right now in the Play Store and like usual Android Police has compiled a great list.
I won't list them all, but highlights include some apps I've been wanting or highly recommend...
SafeInCloud Password Manager – $3.99 from $7.99
PlayerPro Music Player – $1.95 from $3.95
Moon+ Reader Pro – $2.49 from $4.99
Solid Explorer Unlocker – $0.99 from $1.99
Modern Combat 5: Blackout – $3.99 from $6.99
GTA: Chinatown Wars – $2.99 from $4.99
Riptide GP2 – $0.99 from $1.99
Machinarium – $0.99 from $4.99
Anomaly Warzone Earth HD – $0.99 from $3.99
Anomaly 2 – $0.99 from $4.99
Anomaly Korea – $0.99 from $3.99
Anomaly Defenders – $0.50 from $3.99
Leo's Fortune – $0.99 from $4.99
Hitman GO – $0.99 from $4.99
THE KING OF FIGHTERS '98 – $0.99 from $2.99
ESJ: Groove City (with a STEAM key) - $2.99 from $4.99 (Just checked my Wish List and spotted the difference on this one. Picking it up now. Booyah!)
I'm a huge fan of the Anomaly series and I already own most of those, save Defenders and Korea (so I'll be picking up those two right after publishing this post), and I highly recommend them if you're into that sort of game.
Moon+ Reader Pro was my go to epub/CBR reader on my phone and tablet for ages before Google released Google Play Books. They recently updated the app to Material Design though and with it now being on sale I can't see any reason to not pick it up for the heck of it. It's totally worth the full price. On sale and with Material Design for only $2.49? Get outta here! You'd be insane to not buy it.
If there's any apps you don't see here on this list or Android Police's much fuller one be sure to chime in and let us all know. The more the merrier!