Upgrading to El Capitan broke my dropdown terminal TotalTerminal. Is there an alternative dropdown terminal to replace it that is compatible with El Capitan?
If you're willing to disable System Integrity Protection to continue using TotalTerminal, you can do that. If not, the developer of TotalTerminal says the reason he stopped working on it is that he switched to iTerm 2, which he says "offers similar functionality to Visor and comparable features to build-in [sic] Terminal.app." I've never used either, but another question on this site explains how to set up iTerm to work in a similar manner.
I often use treeterm (http://www.treeterm.com). It has it's own file manager which is tightly synced with the working directory of the terminal (the build-in one or the native terminal of the mac).