++ PyRun, a single-file based Python distro 

from dev-site:
"eGenix PyRun™ is our open source, one file, no installation version of Python, making the distribution of a Python interpreter to run based scripts and applications to Unix based systems as simple as copying a single file. eGenix PyRun's executable only needs 11MB for Python 2 and 13MB for Python 3, but still supports most Python applications and scripts - and it can be compressed to just 3-4MB using upx, if needed."