iStat Menus is a lightweight system monitoring tool that displays a wealth of information right in your menu bar. At a glance, I can see my Mac’s CPU temperature, network activity, free RAM, and CPU activity in each core. More detailed information is available by clicking on each menu bar icon. There are even more options available in the tool’s preferences panel. iStat Menus is $16, with a 14-day free trial.
ForkLift is one of the best FTP clients I’ve used on any operating system. It’s beautifully designed, simple to use, and works great. The user interface is similar to a Finder window, and includes a side bar to select local devices and favorite connections. As with many graphical FTP clients, there are two directory navigation panels side by side, one for the remote server and the other for the local client. Transferring files is as simple as dragging a file (or directory) between the two panels. Files can also be dragged to and from Finder windows. Forklift supports plain FTP, FTPS, SFTP, WebDAV, WebDAV over HTTPS, Amazon S3, AFP, and SMB. There are many other interesting features, such as directory synchronization and local mounting of remote directories. Forklift costs about $20 for a single user license.