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:     OFC Nations Cup  (OFC) (ID: 1a19z) (Sort: League) (Playoffs: 4)
    Division: Group A                (ID: d13s7) (Sort: Div) (Playoffs: 2)
      Team:   New Caledonia          (ID: t1m8p)
      Team:   Papua New Guinea       (ID: t1m8r)
      Team:   Samoa                  (ID: t1m8s)
      Team:   Tahiti                 (ID: t1m8u)
    Division: Group B                (ID: d13s8) (Sort: Div) (Playoffs: 2)
      Team:   Fiji                   (ID: t1m8n)
      Team:   New Zealand            (ID: t1m8q)
      Team:   Solomon Islands        (ID: t1m8t)
      Team:   Vanuatu                (ID: t1m8v)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: Oceania
  State: 
  Level: A
  Season: 2016 (current: True)
  Author: Johkey3
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
League: Points, GoalsDelta, GoalsFor, HeadtoHead Points, HeadtoHead
GoalsDelta, HeadtoHead GoalsFor, HeadtoHead Away GoalsFor

Div: Points, GoalsDelta, GoalsFor, HeadtoHead Points, HeadtoHead
GoalsDelta, HeadtoHead GoalsFor, HeadtoHead Away GoalsFor
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  0
  PointsForWinInShootout:  0
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  0
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.1764705882
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.7586206897
  WeightType:  PythagenpatIgnoreShootOutWinningGoals
  WeightExponent:  0.458
  WhatDoYouCallATie:  tie
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  World Cup Qualifying
  Promote:  6
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
5/28/16   New Zealand        3-1   Fiji              (ID: g1qen9) (Neutral)
5/28/16   Vanuatu            0-1   Solomon Islands   (ID: g1qena) (Neutral)
5/29/16   Papua New Guinea   1-1   New Caledonia     (ID: g1qenb)
5/29/16   Tahiti             4-0   Samoa             (ID: g1qenc) (Neutral)
5/31/16   Solomon Islands          Fiji              (ID: g1qend) (Neutral)
5/31/16   Vanuatu            0-5   New Zealand       (ID: g1qene) (Neutral)
6/1/16    New Caledonia            Samoa             (ID: g1qenf) (Neutral)
6/1/16    Papua New Guinea         Tahiti            (ID: g1qeng)
6/4/16    Fiji                     Vanuatu           (ID: g1qenh) (Neutral)
6/4/16    New Zealand              Solomon Islands   (ID: g1qeni) (Neutral)
6/5/16    Papua New Guinea         Samoa             (ID: g1qenj)
6/5/16    Tahiti                   New Caledonia     (ID: g1qenk) (Neutral)
GamesEnd