Mibuild (Milkymist Build system)
  a build system and board database for Migen-based FPGA designs

6-ligne intro:

from migen.fhdl.structure import *
from mibuild.platforms import m1
plat = m1.Platform()
led = plat.request("user_led")
f = Fragment([led.eq(counter[25])], [counter.eq(counter + 1)])
plat.build_cmdline(f)

Code repository:
https://github.com/milkymist/mibuild
Migen:
https://github.com/milkymist/migen
Experimental version of the Milkymist SoC based on Migen:
https://github.com/milkymist/milkymist-ng

Mibuild is designed for Python 3.

Send questions, comments and patches to devel [AT] lists.milkymist.org
Description files for new boards welcome.
We are also on IRC: #milkymist on the Freenode network.

Mibuild is (c) 2013 Sebastien Bourdeauducq and GPLv3 (see LICENSE file).