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: S.League                  (ID: sleague) (Sort: Div) (Playoffs: 1)
    Team: Balestier                 (ID: t120n)
    Team: Geylang                   (ID: t120p)
    Team: Home                      (ID: t120q)
    Team: Jurong                    (ID: t120w)
    Team: Singapore AFFC (SAFFC)    (ID: t120r)
    Team: Sembawang                 (ID: t120s)
    Team: Tanjong Pagar  (T. Pagar) (ID: t120t)
    Team: Tampines                  (ID: t120u)
    Team: Woodlands                 (ID: t120v)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: Singapore
  State: 
  Level: A
  Season: 1997 (current: False)
  Author: Henry Ong
  Note: Created base on http://www.rsssf.com/tabless/singchamp.html
  LotteryNote: 
LeagueEnd

SortBegin
Div: Average Points, Average Points HeadToHead, Average GoalsDelta, 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:  PercentOfPointsWon
  WeightExponent:  0
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  0
  PromotePlus:  0
  PromotePlusPercent:  0
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
3/15/97   Home        0-2   Geylang     (ID: g15jk6)
3/15/97   Sembawang   1-2   SAFFC       (ID: g15jk7)
3/15/97   T. Pagar    4-0   Jurong      (ID: g15jk8)
3/15/97   Tampines    2-3   Woodlands   (ID: g15jk9)
3/22/97   Geylang     0-0   Balestier   (ID: g15jka)
3/22/97   SAFFC       4-0   Jurong      (ID: g15jkb)
3/22/97   T. Pagar    1-1   Sembawang   (ID: g15jkc)
3/22/97   Woodlands   3-2   Home        (ID: g15jkd)
3/29/97   Balestier   3-1   Woodlands   (ID: g15jke)
3/29/97   Geylang     2-2   T. Pagar    (ID: g15jkf)
3/29/97   Home        3-4   Jurong      (ID: g15jkg)
3/29/97   Sembawang   2-2   Tampines    (ID: g15jkh)
4/5/97    Jurong      2-1   Sembawang   (ID: g15jki)
4/5/97    T. Pagar    2-1   Balestier   (ID: g15jkj)
4/5/97    Tampines    1-1   Geylang     (ID: g15jkk)
4/5/97    Woodlands   0-3   SAFFC       (ID: g15jkm)
4/26/97   Balestier   4-2   Tampines    (ID: g15jkn)
4/26/97   Geylang     2-1   Jurong      (ID: g15jkp)
4/26/97   SAFFC       2-0   Home        (ID: g15jkq)
4/26/97   T. Pagar    1-5   Woodlands   (ID: g15jkr)
5/3/97    Home        2-6   Balestier   (ID: g15jks)
5/3/97    SAFFC       2-2   Geylang     (ID: g15jkt)
5/3/97    Tampines    1-2   T. Pagar    (ID: g15jku)
5/3/97    Woodlands   5-3   Sembawang   (ID: g15jkv)
5/10/97   Balestier   0-3   SAFFC       (ID: g15jkw)
5/10/97   Geylang     3-0   Woodlands   (ID: g15jkx)
5/10/97   Jurong      0-0   Tampines    (ID: g15jky)
5/10/97   Sembawang   0-0   Home        (ID: g15jkz)
5/17/97   Balestier   4-0   Sembawang   (ID: g15jm0)
5/17/97   Home        0-3   T. Pagar    (ID: g15jm1)
5/17/97   SAFFC       2-0   Tampines    (ID: g15jm2)
5/17/97   Woodlands   1-0   Jurong      (ID: g15jm3)
5/30/97   Jurong      1-1   Balestier   (ID: g15jm4)
5/30/97   Sembawang   3-3   Geylang     (ID: g15jm5)
5/30/97   T. Pagar    2-1   SAFFC       (ID: g15jm6)
5/30/97   Tampines    0-3   Home        (ID: g15jm7)
6/10/97   Geylang     2-0   Home        (ID: g15jm8)
6/10/97   Jurong      0-2   T. Pagar    (ID: g15jm9)
6/10/97   SAFFC       3-1   Sembawang   (ID: g15jma)
6/10/97   Woodlands   4-1   Tampines    (ID: g15jmb)
6/14/97   Balestier   1-1   Geylang     (ID: g15jmc)
6/14/97   Home        2-3   Woodlands   (ID: g15jmd)
6/14/97   Jurong      0-5   SAFFC       (ID: g15jme)
6/14/97   Sembawang   0-5   T. Pagar    (ID: g15jmf)
6/21/97   Jurong      3-0   Home        (ID: g15jmg)
6/21/97   T. Pagar    1-1   Geylang     (ID: g15jmh)
6/21/97   Tampines    2-1   Sembawang   (ID: g15jmi)
6/21/97   Woodlands   3-2   Balestier   (ID: g15jmj)
6/24/97   Balestier   1-1   T. Pagar    (ID: g15jmk)
6/24/97   Geylang     1-0   Tampines    (ID: g15jmm)
6/24/97   SAFFC       4-1   Woodlands   (ID: g15jmn)
6/24/97   Sembawang   1-1   Jurong      (ID: g15jmp)
6/28/97   Home        1-3   SAFFC       (ID: g15jmq)
6/28/97   Jurong      1-0   Geylang     (ID: g15jmr)
6/28/97   Tampines    2-8   Balestier   (ID: g15jms)
6/28/97   Woodlands   2-0   T. Pagar    (ID: g15jmt)
7/5/97    Balestier   4-1   Home        (ID: g15jmu)
7/5/97    Geylang     0-3   SAFFC       (ID: g15jmv)
7/5/97    Sembawang   2-0   Woodlands   (ID: g15jmw)
7/5/97    T. Pagar    5-1   Tampines    (ID: g15jmx)
7/8/97    Home        2-1   Sembawang   (ID: g15jmy)
7/8/97    SAFFC       5-1   Balestier   (ID: g15jmz)
7/8/97    Tampines    3-1   Jurong      (ID: g15jn0)
7/8/97    Woodlands   2-1   Geylang     (ID: g15jn1)
7/12/97   Jurong      0-2   Woodlands   (ID: g15jn2)
7/12/97   Sembawang   1-3   Balestier   (ID: g15jn3)
7/12/97   T. Pagar    1-0   Home        (ID: g15jn4)
7/12/97   Tampines    1-0   SAFFC       (ID: g15jn5)
7/19/97   Balestier   4-1   Jurong      (ID: g15jn6)
7/19/97   Geylang     2-1   Sembawang   (ID: g15jn7)
7/19/97   Home        1-4   Tampines    (ID: g15jn8)
7/19/97   SAFFC       0-1   T. Pagar    (ID: g15jn9)
GamesEnd