Chronosync, my favorite application for syncing selected files between networks/computers/drives released its 4.5 update today with some pretty nice upgrades.
Everything is faster with speed improvements to scanning (by about 30%) and copying (by about 10-15%). I ran the new version on some of my bigger syncs and the difference is noticeable. The application is also now 64 bit and has retina artwork throughout (Hooray!). They've also added better scheduling and some intelligence to know when you are trying to move forbidden files. In that sense, Chronosync protects you from yourself.
They continue to honor their "free upgrades for life" policy and my upgrade came down no problem. To learn more, go here.