For all you scale and mode buffs out there here's a list of all well known International Scales and Modes. The Chart list each Scale Degree, Semitone Structures etc.
International Scales
"Generic"
Major Scale Semitone Structures
NAME Degrees Original Family
==== ======= ======== ======
Aeolian 12b345b6b7 2122122 1122222
Algerian 12b34#45b67 21211131 11111223
Arabian (a) 12b34#4#567 21212121 11112222
Arabian (b) 1234#4#5b7 2211222 1122222
Theta, Asavari 12b345b6b7 2122122 1122222
Balinese 1b2b35b6 12414 11244
Theta, Bilaval 1234567 2212221 1122222
Theta, Bhairav 1b2345b67 1312131* 1111233
Theta, Bhairavi 1b2b345b6b7 1222122 1122222
Byzantine 1b2345b67 1312131* 1111233
Chinese 13#457 42141 11244
Chinese Mongolian 12356 22323 22233
Diminished 12b34#4#567 21212121 11112222
Dorian 12b3456b7 2122212* 1122222
Egyptian 1245b7 23232* 22233
Ethiopian (A raray) 1234567 2212221 1122222
Ethiopian (Geez & Ezel) 12b345b6b7 2122122 1122222
Harmonic Minor 12b345b67 21222131 1112223
Hawiian 12b34567 2122221 1122222
Hindustan 12345b6b7 2212122* 1122222
Hungarian Major 1#23#456b7 3121212 1112223
Hungarian Gypsy 12b3#45b67 2131131 1111233
Hungarian Gypsy Persian 1b2345b67 1312131* 1111233
Hungarian Minor 12b3#45b67 2131131 1111233
Ionian 1234567 2212221 1122222
Japanese (A) 1b245b6 14214 11244
Japanese (B) 1245b6 23214 12234
Japanese (Ichikosucho) 1234#4567 22111221 11112222
Japanese (Taishikicho) 1234#456#67 221112111 111111222
Javaneese 1b2b3456b7 1222212 1122222
Jewish (Adonai Malakh) 1b22b3456b7 11122212 11112222
Jewish (Ahaba Rabba) 1b2345b6b7 1312122 1112223
Jewish (Magen Abot) 1b2#23#4#5#67 12122211 11112222
Theta, Kafi 12b3456b7 2122212* 1122222
Theta, Kalyan 123#4567 2221221 1122222
Theta, Khamaj 123456b7 2212212 1122222
Locrian 1b2b34#4#5b7 1221222 1122222
Lydian 123#4567 2221221 1122222
Major 1234567 2212221 1122222
Theta, Marva 1b23#4567 1321221 1112223
Mela Bhavapriya (44) 1b2245#56 1132113 1111233
Mela Chakravakam (16) 1b23456b7 1312212 1112223
Mela Chalanata (36) 1#2345#67 3112311 1111233
Mela Charukesi (26) 12345b6b7 2212122* 1122222
Mela Chitrambari (66) 123#45#67 2221311 1112223
Mela Dharmavati (59) 12b3#4567 2131221 1112223
Mela Dhatuvardhani (69) 1#23#45b67 3121131 1111233
Mela Dhavalambari (49) 1b23#45#56 1321113 1111233
Mela Dhenuka (9) 1b2b345b67 1222131 1112223
Mela Dhirasankarabharana (29) 1234567 2212221 1122222
Mela Divyamani (48) 1b2b3#45#67 1231311 1111233
Mela Gamanasrama (53) 1b23#4567 1321221 1112223
Mela Ganamurti (3) 1b2245b67 1132131 1111233
Mela Gangeyabhusani (33) 1#2345b67 3112131 1111233
Mela Gaurimanohari (23) 12b34567 2122221 1122222
Mela Gavambodhi (43) 1b2b3#45#56 1231113 1111233
Mela Gayakapriya (13) 1b2345#56 1312113 1111233
Mela Hanumattodi (8) 1b2b345b6b7 1222122 1122222
Mela Harikambhoji (28) 123456b7 2212212 1122222
Mela Hatakambari (18) 1b2345#67 1312311 1111233
Mela Hemavati (58) 12b3#456b7 2131212 1112223
Mela Jalarnavam (38) 1b22#45b6b7 1141122 1111224
Mela Jhalavarali (39) 1b22#456b7 1141131 1111134
Mela Jhankaradhvani (19) 12b345#656 2122113 1112223
Mela Jyotisvarupini (68) 1#23#45b6b7 3121122 1112223
Mela Kamavardhani (51) 1b23#45b67 1321131 1111233
Mela Kanakangi (1) 1b2245#56 1132113 1111233
Mela Kantamani (61) 123#45#56 2221113 1112223
Mela Kharaharapriya (22) 12b3456b7 2122212* 1122222
Mela Kiravani (21) 12b345b67 2122131 1112223
Mela Kokilapriya (11) 1b2b34567 1222221* 1122222
Mela Kosalam (71) 1#23#4567 3121221 1112223
Mela Latangi (63) 123#45b67 2221131 1112223
Mela Manavati (5) 1b224567 1132221 1112223
Mela Mararanjani (25) 12345#56 2212113 1112223
Mela Mayamalavagaula (15) 1b2345#56 1312113 1111233
Mela Mechakalyani (65) 123#4567 2221221 1122222
Mela Naganandini (30) 12345#67 2212311 1112223
Mela Namanarayani (50) 1b23#45b6b7 1321122 1112223
Mela Nasikabhusani (70) 1#23#456b7 3121212 1112223
Mela Natabhairavi (20) 12b345b6b7 2122122 1122222
Mela Natakapriya (10) 1b2b3456b7 1222212 1122222
Mela Navanitam (40) 1b22#456b7 1141212 1111224
Mela Nitimati (60) 12b3#45#67 2131311 1111233
Mela Pavani (41) 1b22#4567 1141221 1111224
Mela Ragavardhani (32) 1#2345b6b7 3112122 1112223
Mela Raghupriya (42) 1b22#45#67 1141311 1111134
Mela Ramapriya (52) 1b23#456b7 1321212 1112223
Mela Rasikapriya (72) 1#23#45#67 3121311 1111233
Mela Ratnangi (2) 1b2245b6b7 1132122 1112223
* = indicates symmetry, i.e. structure is the same used forward
or backwards
