You can add leagues, big or small, to Sports Club Stats.
   It's free.
   It's easy.
   Just email import@sportsclubstats.com the:
      structure
      schedule
      and rules
   In a few minutes you'll get back a link to the league.
   Play around, have fun, you won't break anything.
   I look forward to seeing what you create.

Info about the various settings:
   https://docs.google.com/document/d/1-UneDNk6tkOrc_B-WBnGnc5KGiy2kttXC2fW8dR7QzM/edit?hl=en

For example, here is what created this league:

LeagueBegin
  League: North American Soccer League (NASL)           (ID: usl) (Sort: Div) (Playoffs: 1)
    Team: Atlanta Silverbacks          (Atlanta)        (ID: t123e)
    Team: Carolina Railhawks           (Carolina)       (ID: t123c)
    Team: FC Edmonton                  (Edmonton)       (ID: t123n)
    Team: Fort Lauderdale Strikers     (Ft. Lauderdale) (ID: t123p)
    Team: Minnesota United FC          (Minnesota)      (ID: t123r)
    Team: San Antonio Scorpions        (San Antonio)    (ID: t123s)
    Team: Tampa Bay Rowdies            (Tampa Bay)      (ID: t123j)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: USA
  State: 
  Level: B
  Season: 2013Spring (current: False)
  Author: Jake Sillick
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Div: Average Points, Average GoalsDelta, Average GoalsFor, Average
Points HeadToHead, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.26190476190476
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.61290322580645
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  0
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
4/6/13    7:30 PM   Ft. Lauderdale   1-1   Edmonton         (ID: g1a3gm)
4/6/13    7:30 PM   Tampa Bay        0-0   Carolina         (ID: g1a3gn)
4/6/13    8:00 PM   Minnesota        0-0   San Antonio      (ID: g1a3gp)
4/13/13   7:00 PM   Carolina         2-1   Edmonton         (ID: g1a3gq)
4/13/13   7:30 PM   Atlanta          2-0   Ft. Lauderdale   (ID: g1a3gr)
4/13/13   8:30 PM   San Antonio      0-2   Tampa Bay        (ID: g1a3gs)
4/20/13   3:30 PM   Minnesota        2-0   Edmonton         (ID: g1a3gt)
4/20/13   7:00 PM   Carolina         3-1   Ft. Lauderdale   (ID: g1a3gu)
4/20/13   7:30 PM   Tampa Bay        3-4   Atlanta          (ID: g1a3gv)
4/27/13   7:30 PM   Atlanta          2-3   Minnesota        (ID: g1a3gw)
4/27/13   7:30 PM   Ft. Lauderdale   1-2   Tampa Bay        (ID: g1a3gx)
4/28/13   4:00 PM   Edmonton         1-0   San Antonio      (ID: g1a3gy)
5/4/13    7:30 PM   Tampa Bay        1-1   Edmonton         (ID: g1a3gz)
5/4/13    8:00 PM   Minnesota        2-2   Carolina         (ID: g1a3h0)
5/4/13    8:30 PM   San Antonio      2-2   Atlanta          (ID: g1a3h1)
5/11/13   7:00 PM   Carolina         5-2   San Antonio      (ID: g1a3h2)
5/11/13   7:30 PM   Ft. Lauderdale   2-1   Minnesota        (ID: g1a3h3)
5/12/13   4:00 PM   Edmonton         3-0   Atlanta          (ID: g1a3h4)
5/18/13   3:30 PM   Minnesota        2-3   Tampa Bay        (ID: g1a3h5)
5/18/13   7:30 PM   Atlanta          2-0   Carolina         (ID: g1a3h6)
5/18/13   8:30 PM   San Antonio      3-1   Ft. Lauderdale   (ID: g1a3h7)
5/25/13   7:30 PM   Atlanta          1-0   San Antonio      (ID: g1a3h8)
5/25/13   7:30 PM   Tampa Bay        2-3   Minnesota        (ID: g1a3h9)
5/26/13   4:00 PM   Edmonton         0-1   Ft. Lauderdale   (ID: g1a3ha)
6/1/13    7:30 PM   Ft. Lauderdale   1-1   Carolina         (ID: g1a3hb)
6/1/13    8:30 PM   San Antonio      2-0   Minnesota        (ID: g1a3hc)
6/2/13    4:00 PM   Edmonton         0-0   Tampa Bay        (ID: g1a3hd)
6/8/13    7:00 PM   Carolina         2-1   Tampa Bay        (ID: g1a3he)
6/8/13    7:30 PM   Atlanta          1-1   Edmonton         (ID: g1a3hf)
6/8/13    8:00 PM   Minnesota        2-1   Ft. Lauderdale   (ID: g1a3hg)
6/15/13   7:30 PM   Ft. Lauderdale   0-1   Atlanta          (ID: g1a3hh)
6/15/13   7:30 PM   Tampa Bay        1-2   San Antonio      (ID: g1a3hi)
6/16/13   4:00 PM   Edmonton         1-1   Carolina         (ID: g1a3hj)
6/22/13   7:00 PM   Carolina         3-2   Minnesota        (ID: g1a3hk)
6/22/13   7:30 PM   Atlanta          1-2   Tampa Bay        (ID: g1a3hm)
6/22/13   8:30 PM   San Antonio      2-1   Edmonton         (ID: g1a3hn)
6/29/13   7:00 PM   Carolina         1-1   Atlanta          (ID: g1a3hp)
6/29/13   7:30 PM   Ft. Lauderdale   1-4   San Antonio      (ID: g1a3hq)
6/30/13   4:00 PM   Edmonton         3-1   Minnesota        (ID: g1a3hr)
7/4/13    6:30 PM   Tampa Bay        4-0   Ft. Lauderdale   (ID: g1a3hs)
7/4/13    8:00 PM   Minnesota        0-3   Atlanta          (ID: g1a3ht)
7/4/13    8:30 PM   San Antonio      2-0   Carolina         (ID: g1a3hu)
GamesEnd