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:     Pacific Games     (ID: 1a110) (Sort: League) (Playoffs: 4)
    Division: Group A           (ID: d133v) (Sort: Conf) (Playoffs: 4)
      Team:   Fiji              (ID: t1h2i)
      Team:   Micronesia        (ID: t1h2j)
      Team:   Tahiti            (ID: t1h2q)
      Team:   Vanuatu           (ID: t1h2r)
    Division: Group B           (ID: d133w) (Sort: Conf) (Playoffs: 2)
      Team:   New Caledonia     (ID: t1h2k)
      Team:   New Zealand       (ID: t1h2m)
      Team:   Papua New Guinea  (ID: t1h2n)
      Team:   Solomon Islands   (ID: t1h2p)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: OFC
  State: 
  Level: 1
  Season: 2015 (current: True)
  Author: Markus Paminger
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Conf: Points, GoalsDelta, GoalsFor, Points HeadToHead, DrawLots

League:least PositionInParent, Points, GoalsDelta, GoalsFor, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  3
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.25
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  Pythagorean
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  Round of 4
  Promote:  4
  PromotePlus:  0
  PromotePlusPercent:  0.5
  WhatDoYouCallDemoted:  Eliminated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
7/2/15   Micronesia         0-30   Tahiti             (ID: g1m6yn)
7/2/15   New Zealand        2-0    Solomon Islands    (ID: g1m6yp)
7/3/15   Fiji               1-1    Vanuatu            (ID: g1m6yq)
7/3/15   Papua New Guinea   0-1    New Caledonia      (ID: g1m6yr)
7/4/15   Micronesia         0-38   Fiji               (ID: g1m6ys)
7/4/15   New Caledonia      1-0    Solomon Islands    (ID: g1m6yt)
7/5/15   Papua New Guinea   0-1    New Zealand        (ID: g1m6yu)
7/5/15   Tahiti             2-1    Vanuatu            (ID: g1m6yv)
7/6/15   Solomon Islands    1-2    Papua New Guinea   (ID: g1m6yw)
7/6/15   Vanuatu            46-0   Micronesia         (ID: g1m6yx)
7/7/15   New Caledonia      0-5    New Zealand        (ID: g1m6yy)
7/7/15   Tahiti             0-0    Fiji               (ID: g1m6yz)
GamesEnd