The newest version of minecraft released today called the Minecraft 1.7.9 update. The 1.7.9 update is again just like the 1.7.7 & 1.7.8 updates which were basically put out for security issues and just so Mojang could keep pushing out updates!
Because this is important, let me repeat that last sentence:
Please make sure that you are in the correct server mode (online mode/offline mode) when you start the 1.7.9 server for the first time, because profiles are not compatible between these two server modes.
Cross-platform server jar: https://minecraftlucky.com/dowload/file-3254
Cross-platform server windows exe: https://minecraftlucky.com/dowload/file-3255