Try mRemoteNG. It's not quite SecureCRT, but I switched long ago and haven't regretted the move. It has a nice tabbed UI and supports many protocols (ssh, RDP,

Try mRemoteNG. It's not quite SecureCRT, but I switched long ago and haven't regretted the move. It has a nice tabbed UI and supports many protocols (ssh, RDP, VNC, etc.). It has recently returned to active development.