PuTTY++ is an improvement of the famous PuTTY SSH client and terminal emulator, with additional features:

• Multiple terminal sessions in single frame window.
  No background PuTTY processes, no window embedding.
  Everything is handled by single process.
• Sign incoming data for not visible terminal sessions.
• Prevent accidental paste of big clipboard data.
• Embedded pterm as ConPTY backend.
• Embedded psftp as SFTP backend.
• Find in terminal buffer.

Source code: https://github.com/tkovacs-2/puttypp

Windows 32bit executable: putty++_v0.6_win32.zip