Cheat Sheets

https://zeltser.com/

http://digital-forensics.sans.org/community/cheat-sheets

SANS:
http://pen-testing.sans.org/resources/downloads

http://digital-forensics.sans.org/community/cheat-sheets

http://www.sans.org/security-resources/tcpip.pdf

https://blogs.sans.org/pen-testing/files/2016/05/PowerShellCheatSheet_v41.pdf

https://blogs.sans.org/pen-testing/files/2016/07/SEC573_PythonCheatSheet_06272016.pdf

http://www.sans.org/security-resources/sec560/windows_command_line_sheet_v1.pdf

http://www.sans.org/security-resources/sec560/netcat_cheat_sheet_v1.pdf

http://www.sans.org/security-resources/sec560/misc_tools_sheet_v1.pdf

https://blogs.sans.org/pen-testing/files/2013/10/NmapCheatSheetv1.0.pdf

http://blogs.sans.org/pen-testing/files/2016/04/ScapyCheatSheet_v0.2.pdf