See also the H-to-G and H-to-Gn collections.
EDIT: Things are looking much better now! There's the latest complete 5 August 2016 update from thunk, which includes the conduit compiler ZIP file. And now there's a November 2017 update from Calcyman, but without the conduit compiler.
EDIT2: I've finally (17 May 2018) gotten around to getting the conduit compiler working and up-to-date again.
EDIT3: Freywa has posted a new and improved version of the ECC (7 December 2018).
Stamp collection pattern:
Individual conduit files, with the compilation script that produces the above stamp collection:
Here's the current center-cell diagram:
x = 84, y = 21, rule = LifeHistory
.3D7.3D6.D2.D7.2D7.3D7.3D8.2D7.D3.D6.2D$.D2.D6.D2.D5.D2.D6.D2.D6.D2.D
6.D2.D6.D2.D6.D3.D5.D2.D$.D2.D6.D2.D5.D2.D6.D9.D2.D6.D2.D6.D2.D6.D3.D
5.D$.3D7.3D6.4D6.D9.D2.D6.D2.D6.D2.D6.D3.D5.D.2D$.D2.D6.D2.D5.D2.D6.D
9.D2.D6.3D7.D2.D6.D.D.D5.D2.D$.D2.D6.D2.D5.D2.D6.D2.D6.D2.D6.D9.D.D7.
2D.2D5.D2.D$.D2.D6.3D6.D2.D7.2D7.3D7.D10.D.D6.D3.D6.2D3$.4B$6B$8B$10B
$10B4.2B2.2B40.D$2BD10BD7BD38.2D$2BCD10BD6BDBD7.3D8.2D6.3D8.2D9.2D7.D
$B2D7B2.2BCD5BDCDB7.CD7.DCD7.CD8.DCD8.CD7.CD$10B2.B2D8BD6.D.2D6.D2.D
6.3D8.2D8.2D7.3D$13BD8B8.2D8.D.D17.2D9.D$15B.B24.D18.D$5B.B3.B!
#C [[ HEIGHT 240 ]]
EDIT: List of conduit names in text format, from the 17 May 2018 collection:
BFx157B, BRx161B, BRx161B_Lx303H, BRx46B, BFx199B, BRx204B, BR24B, BB309B, BSW6T73_SW10T285, BSE8T-22, BNW-12T9_SE22T31, BSE22T31, BNE5T66, BSE48T33, BNE17T68, BNW-4T72, BNW5T30, BSW-5T37, BNW39T172, BSE15T2, BSW1T250_BSE15T2, BSW6T73, BNE14T30, BSE1T1, BNW-11T124, BFx59Ha, BFx59Ha, BFx59Hb, BFx59Hc, BFx59Hd, BFx59He, BR146H, BR84H, BBx187H, BF187Ha, BF187Hb, BRx161B_Lx303H, BF20Ha, BF20Hb, BR292H, BBx251H, BLx291H, BF137H, BF22P, BR241P, BF221P, BLx19R, BBx19R, BFx176R, BFx183R, CFx53B, CF85B, CRx28B, CFx50C, CBx37C, CF106C, CNW10T73a, CNW10T73b, CNW-1T27a, CNW-1T27b, CSE12T35, CNE0T0, CNE-1T9, CSW-7T74, CSW-4T34, CNW-12T13, CFx73H, CB148P, CL26R, G000NE_quadri-Snark, G00NE_tremi-Snark, G0C_semi-cenark-base, G0NE_semi-Snark, G0NE_CP_semi-cenark, G0NE_CC_semi-cenark, G11R, G13SE9, G13FxR, G18SW_SEa, G18SW_SEb, G2SWG3, G2SEa, G2SEb, G2NWa, G2NWb, G2H, G2Ra, G2Rb, G3SWG3, G4SWG3, G4SWa, G4SWb, G4R, G5SW, G5SE, G5H, G5R, G6SE2a, G6SE2b, G6H, G6Ra, G6Rb, GNEo_Snark, GNW8a_rectifier, GNW8b_boojum_reflector, GNEe_SWo_NW54_Silver_reflector, G-15FHb_syringe_depend, G-15FHa_syringe, G-2RH_SilverGtoH575rep, G-29RH_SilverGtoH497rep, HFx58Ba, HFx58Bb, HFx107B, HF94B, HRx131B, HLx53B, HL141B, HL79B, HR203B, HR44Ba, HR44Bb, HR44Bc, HR143B, HR117B, HFx197B, HRx32B, HF122B, HLx59B, HBx138B, HF110B, HB56B, HL98B, HL153B, HL226B, HLx103B, HR48B, HLx185B, HF214B, HB62B, HFx236B, HF123B, HB119B, HF144B_adjustable, HRx160C, HR160C, HF104C, HR43C, HSW-2T145_SW-2T21, HSW-2T140_SW-2T21, HSW-2T345_SW-2T21_NW38T161, HSW-1T110_SW-2T21, HSW-1T177_SW-2T21, HNW31T120_NW30T234, HSW0T230_SW-2T21, HSW-4T237_SW-2T21, HSW0T320_SW-2T21, HSW-2T21_SW-4T104, HNW31T120_NW29T213, HNW19T102_NW21T247, HSE39T59_SE41T149, HSW1T118_SW-2T21, HSW1T43_SW-2T21, HSW2T98_SW-2T21, HNW31T207_NW35T419, HSW-7T38_SW-2T21, HSW3T188_SW-2T21, HNW31T120_NW26T163, HSW3T118_SW-2T21, HSW4T188_SW-2T21, HSW-8T89_SW-2T21, HNW25T126_NW31T120, HNW24T386_NW31T120, HSW5T160_SW-2T21_SE22T-8, HSE22T-8_SE29T-2, HSW5T105_SW-2T21, HSW-10T202_SW-2T21, HSW6T167_SW-2T21, HSW7T255_SW-2T21, HSE7T14_SE16T36, HSW10T108_SW19T319, HSW7T94_SW-2T21, HSW-2T21a, HSW-2T21b, HSW10T108, HSW10T97, HSW25T179, HNW19T102, HNW31T120, HNW18T106, HNW8T186, HNW30T138, HNW17T130, HNW16T108, HNW2T132, HNW22T200, HSE-2T47, HNE36T22, HNE18T32, HNE23T140, HNE16T14a, HNE16T14b, HNE8T3, HSE22T-8, HSE-2T80, HSE5T227, HSE31T60, HSE5T23, HSE39T59, HSE7T14a, HSE7T14b, HNE5T-4, HSE23T-6, HNW-5T80, HSE5T12, HNW6T106, HNW16T96, HSW4T44, HSE16T100, HSE29T12, HNE2T56, HNW26T109, HSE-17T106, HSE30T14, HSE21T-4, HSE19T106, HNE1T22, HSW8T86, HSW28T1784, HSW15T116, HSE10T19, HSE-1T41, HNW36T128, HNE34T49, HSE18T9, HNW16T124, HSW3T118, HSW13T112, HNW17T90, HSW15T118, HNW36T126, HNE37T12, HSE10T29, HNW2T196, HNW1T192, HNE-27T176, HSW7T94, HNE15T22, HNW34T204, HNW39T203, HNE-14T138, HSE16T36, HSE19T42, HF116Ha, HF116Hb, HF171H, HFx77Ha, HFx77Hb, HFx119H, HB60H, HR64H, HR126H, HRx140H, HFx158H, HBx125H, HRx162H, HRx191H, HLx86H, HF150H, HR197H, HBx106H_Fx119H, HLx226H, HLx231H, HF271H, HF244H, HBx362H, HR321H, HR246H, HS-15T152M, HF95P, HF2P, HL75P, HL167P, HB62P, HL227P, HF134P, HF135Q, HLx69R, HLx86R, HLx111R, HF157R, HB91R, HF124R, HRx334R, HR107R, HL83R, HLx30R, HL156R, HR149R, HF73R, HL166W, HL163W, HFx135W, HF198W, HLx36W, LNEe_FomichevLtoG, MNWe_MerzenichMtoG, MNEe_FomichevMtoG, PLx9B, PR9B, PB68B, PBx68B, PR112B, PLx112B, PB90B, PBx90B, PF40B, PFx40B, PB173B, PBx173B, PL328C, PRx328C, PLx142C_R142C, PB146C, PBx146C, PF39C, PFx39C, PNW6T138, PNE9T138, PSE24T144, PNW11T160, PNW6T184, PNW-3T177, PNW7T126, PSE20T111, PSE34T59, PSE3T-5, PNE-6T40_SE-6T40, PSE-14T66, PNE19T123, PNW-8T28, PNE8T63, PNW-16T5, PNW6T114_NE17T206, PF171H, PFx171H, PF81Ha, PFx81Ha, PF81Hb, PFx81Hb, PF81Hc, PFx81Hc, PF81Hd, PFx81Hd, PF99H, PFx99H, PLx196H, PR196H, PS12T565L, PL8P, PR8P, PF31Qa, PF31Qb, PLx127R, PR127R, PF140R, PFx140R, PL124R, PRx124R, PF291R, PFx291R, PL153R, PRx153R, PBx30R, PB30R, PB41R, PBx41R, PF35Wa, PFx35Wa, PF35Wa, PFx35Wb, PF56W, PFx56W, QF116B, QFx116B, QLx149B, QR149B, QNE6T144, QNW-10T57, QNE8T54, QNE9T144, QLx232Ha, QR232Ha, QLx232Hb, QR232Hb, QL226H, QRx226H, QF138W, QFx138W, QF157W, QFx157W, RF28Ba, RF28Bb, RF28Bc, RF28Bd, RF28Be, RF28Bf, RF28Bg, RF28Bh, RF28Bi, RBx22B, RLx70B, RLx20C, RSW0T41, RNE-19T84, RNW3T46, RSW5T38, RSW3T62, RNW-16T104, RSW3T42, RSW4T37, RSW-1T33, RNE2T28, RSE-3T46, RSE-3T41, RNW-1T43, RSW13T28a, RSW13T28b, RNE6T46, RF48Ha, RF48Hb, RF48Hc, RF48Hd, RF48He, RF48Hf, RF48H_B164R, RR56Ha, RR56Hb, RR56Hc, RR174H, RR112H, RF29Pa, RF29Pb, RB57P, RF57Ra, RF57Rb, RF48H_B164R, RFx36R, WNW-3T100, WNW-18T15, WFx46H
Names from the August 2016 collection, for comparison -- there are some simplifications in the G(n) converters:
BB309B, BBx187H, BBx19R, BBx251H, BF137H, BF187Ha, BF187Hb, BF20Ha, BF20Hb, BF221P, BF22P, BFx157B, BFx176R, BFx183R, BFx199B, BFx59H, BLx19R, BLx291H, BNE14T30, BNE17T68, BNE5T66, BNW-11T124, BNW-12T9_SE22T31, BNW-4T72, BNW39T172, BNW5T30, BR146H, BR241P, BR24B, BR292H, BR84H, BRx161B, BRx161B_Lx303H, BRx161B_Lx303H, BRx204B, BRx46B, BSE15T2, BSE1T1, BSE22T31, BSE48T33, BSE8T-22, BSW-5T37, BSW1T250_BSE15T2, BSW6T73, BSW6T73_SW10T285, CB148P, CBx37C, CF106C, CF85B, CFx50C, CFx53B, CFx73H, CL26R, CNE-1T9, CNE0T0, CNW-12T13, CNW-1T27a, CNW-1T27b, CNW10T73a, CNW10T73b, CRx28B, CSE12T35, CSW-4T34, CSW-7T74, G-10G1LR, G-15FHa_syringe, G-15FHb_syringe_depend, G-19G-17FxR, G-22G-17FxR, G-23G-17FxRa, G-23G-17FxRb, G-29RH_SilverGtoH497rep, G-2RH_SilverGtoH575rep, G-30G-17FxR, G-35G-30LxH, G-9G-5LxR, G17G19RR, G25G31BH, G26G31BH, G29G31BH, GG0NEe_Semi-Snark, GG13SE9, GG18SWo_SE10a, GG18SWo_SE10b, GG2NW-8, GG2NW10, GG2SE-2, GG2SE6, GG2SWoG3, GG3SWeG3, GG4SWea, GG4SWeb, GG4SWoG3, GG5SE1, GG5SWo, GG6SE2a, GG6SE2b, GNEe_SWo_NW54_Silver_reflector, GNEo_Snark, GNW8a_rectifier, GNW8b_boojum_reflector, HB119B, HB56B, HB60H, HB62B, HB62P, HB91R, HBx106H_Fx119H, HBx125H, HBx138B, HBx362H, HF104C, HF110B, HF116Ha, HF116Hb, HF122B, HF124R, HF134P, HF135Q, HF144B_adjustable, HF150H, HF157R, HF171H, HF198W, HF214B, HF244H, HF271H, HF2P, HF94B, HF95P, HFx107B, HFx119H, HFx135W, HFx158H, HFx197B, HFx236B, HFx58Ba, HFx58Bb, HFx77Ha, HFx77Hb, HL141B, HL153B, HL156R, HL163W, HL166W, HL167P, HL226B, HL227P, HL75P, HL79B, HL83R, HL98B, HLx103B, HLx111R, HLx185B, HLx226H, HLx231H, HLx30R, HLx36W, HLx53B, HLx59B, HLx69R, HLx86H, HLx86R, HNE-14T138, HNE16T14a, HNE16T14b, HNE18T32, HNE1T22, HNE23T140, HNE2T56, HNE36T22, HNE5T-4, HNE8T3, HNW-5T80, HNW16T108, HNW16T96, HNW17T130, HNW18T106, HNW19T102, HNW19T102_NW21T247, HNW22T200, HNW24T386_NW31T120, HNW25T126_NW31T120, HNW26T109, HNW2T132, HNW30T138, HNW31T120, HNW31T207_NW35T419, HNW34T204, HNW39T203, HNW6T106, HNW8T186, HR107R, HR117B, HR126H, HR143B, HR149R, HR160C, HR197H, HR203B, HR246H, HR321H, HR43C, HR44Ba, HR44Bb, HR44Bc, HR48B, HR64H, HRx131B, HRx140H, HRx160C, HRx162H, HRx191H, HRx32B, HRx334R, HS-15T152M, HSE-17T106, HSE-2T47, HSE-2T80, HSE16T100, HSE16T36, HSE19T106, HSE19T42, HSE21T-4, HSE22T-8, HSE22T-8_SE29T-2, HSE23T-6, HSE29T12, HSE30T14, HSE31T60, HSE39T59, HSE39T59_SE41T149, HSE5T12, HSE5T227, HSE5T23, HSE7T14_SE16T36_NW31T120, HSE7T14a, HSE7T14b, HSW-10T202_SW-2T21, HSW-1T110_SW-2T21, HSW-1T177_SW-2T21, HSW-2T140_SW-2T21, HSW-2T145_SW-2T21, HSW-2T21_SW-4T104, HSW-2T21a, HSW-2T21b, HSW-2T345_SW-2T21_NW38T161, HSW-4T237_SW-2T21, HSW-7T38_SW-2T21, HSW-8T89_SW-2T21, HSW0T230_SW-2T21, HSW0T320_SW-2T21, HSW10T108, HSW10T108_SW19T319, HSW10T97, HSW1T118_SW-2T21, HSW1T43_SW-2T21, HSW25T179, HSW2T98_SW-2T21, HSW3T188_SW-2T21, HSW4T188_SW-2T21, HSW4T44, HSW5T160_SW-2T21_SE22T-8, HSW6T167_SW-2T21_NW31T120, HSW7T255_SW-2T21, HSW8T86, LNEe_FomichevLtoG, MNEe_FomichevMtoG, MNWe_MerzenichMtoG, PB146C, PB173B, PB30R, PB41R, PB68B, PB90B, PBx146C, PBx173B, PBx30R, PBx41R, PBx68B, PBx90B, PF140R, PF171H, PF291R, PF31Qa, PF31Qb, PF35W, PF39C, PF40B, PF56W, PF81Ha, PF81Hb, PF81Hc, PF81Hd, PF99H, PFx140R, PFx171H, PFx291R, PFx35W, PFx39C, PFx40B, PFx56W, PFx81Ha, PFx81Hb, PFx81Hc, PFx81Hd, PFx99H, PL124R, PL153R, PL328C, PL8P, PLx112B, PLx127R, PLx142C_R142C, PLx196H, PLx9B, PNE-6T40_SE-6T40, PNE19T123, PNE8T63, PNE9T138, PNW-16T5, PNW-3T177, PNW-8T28, PNW11T160, PNW6T138, PNW6T184, PNW7T126, PR112B, PR127R, PR196H, PR8P, PR9B, PRx124R, PRx153R, PRx328C, PS12T565L, PSE-14T66, PSE20T111, PSE24T144, PSE34T59, PSE3T-5, QF116B, QF138W, QF157W, QFx116B, QFx138W, QFx157W, QL226H, QLx149B, QLx232Ha, QLx232Hb, QNE6T144, QNE8T54, QNE9T144, QNW-10T57, QR149B, QR232Ha, QR232Hb, QRx226H, RB57P, RBx22B, RF28Ba, RF28Bb, RF28Bc, RF28Bd, RF28Be, RF28Bf, RF28Bg, RF28Bh, RF28Bi, RF29Pa, RF29Pb, RF48H_B164R, RF48H_B164R, RF48Ha, RF48Hb, RF48Hc, RF48Hd, RF48He, RF48Hf, RF57Ra, RF57Rb, RFx36R, RLx20C, RLx70B, RNE-19T84, RNE2T28, RNE6T46, RNW-16T104, RNW-1T43, RNW3T46, RR112H, RR174H, RR56Ha, RR56Hb, RR56Hc, RSE-3T41, RSE-3T46, RSW-1T33, RSW0T41, RSW3T42, RSW3T62, RSW4T37, RSW5T38, WFx46H, WNW-18T15, WNW-3T100