[HTC One S] ZackehSoul:
I know there was a previous thread detailing everything available on the VilleC2 forum but it's massively out of date and the OP seems to have abandoned it - so I figured I'd start up a new thread just to make sure everyone is informed. Note that some ROMs aren't on here because they're outdated and/or buggy. I've attempted to order most of them by how often they'll receive updates:

Firmwares:

How to update firmware (S3)

[FIRMWARE] Official 3.19.401.101 Firmare

[OTA][S3] India CID__038 4.1.1 Official Jelly Bean Stock

[RUU][S3]VilleC2.India.4.0.4

[RUU][S3]VILLEC2_U_ICS_40_HTCCN_CHS_1.11.1400.113_

Mods:

[S3-MODS] APM + HEQS + % BATTERY | JB | Sense 4+

Recoveries:

CWM Recovery

TWRP Recovery

Root:

[ROOT] [S3] VilleC Superboot R1

Sense Based ROMs:

[ROM][JB][Sense 5][14.02] Team Venom presents: ViperC2 5.1.0 - Nothing is impossible!

[ROM][JB][Sense 4+][15.10] Team Venom presents: ViperC2 3.1.3 - always one step ahead

[ROM][PORT][SENSE 5][4.1.2] LIBERTY ROM (version 4)

[ROM][Update 3.8.16]MIUI v5 Sense Based

[ROM] Official 3.19.401.101 | Android 4.1.1 | (De)odexed | Init.d | Rooted | Sense 4+

[ROM][PORT]Unofficial ViperS Rom V3.01 One S C2

[ROM][S3][AROMA][4.1.1 Sense 4+][Tweaks][Indian OTA base] luxandroidROM_v4

[ROM][DISCONTINUED][S3][18 FEB] TrickDroid 6.0.0 | Tweaks | 4.1.1 | Sense 4+

[ROM] Official 3.19.401.101 OTA | JB 4.1.1 | Sense 4+

[ROM][S3][18 NOV] mcOneS3 v1.0.0 | mcTweaker | Smooth & Stable | 4.0.4 | Sense 4.1

[ROM][S3] BackToBasics_v3 (based on RUU_VILLEC2_U_ICS_40_HTC_Europe_1.11.401.110)

Sense Kernels:

[Kernel 3.4] [Sense] Liberty Kernel v2

[KERNEL] [Mar 17] Bulletproof-1.2 | S2W | FIOPS | Intellidemand | battery life

HTC One s C2 Kernel_v1.1. added CPU controller, sweep2wake, GPU overclocked from 300

S-OFF:

[s-off] moonshine s-off for ville_c2

Stock (AOSP) ROMs:

[ROM] Cyanogenmod 11 | Kit Kat | 3.4 kernel | [06/03]

[ROM][OFFICIAL][KitKat 4.4.2][VILLEC2] PAC-man 4.4 [AOSP]

[ROM][KK][4.4.2] CarbonRom [27/2/2014]

[4.4.2][KK] SlimKat Unofficial [20/02/2014]

[ROM][4.3.1][28.10.2013]AOKP-Android. Infused with magical unicorn bytes.

[ROM][4.3.1][05.11.2013]PRO-BAM

[ROM][4.3][UNOFFICIAL]CarbonRom[Active Display, Halo][28 Sept]

[ROM][4.3] Unofficial Cyanogenmod 10.2

[ROM][4.3][Official] PAC-Man ROM Version 4.3 - Halo 2.0(Nightlies)

[ROM][4.2.2][WIP] Unofficial Cyanogenmod 10.1

[ROM][Beta]AOKP "The Swagging Continues"[4.2.2][05/29][AC!D Is Back!]

[4.3.0]Mokee Open Source Project [PA's PIE,HALO,more Settings..]

[ROM][JB] [4.2.2] Avatar ROM

[rom][S-3]Unofficial Carbon~HALO

[4.2.2]Mokee Open Source Project[PA's PIE,HALO,more settings..] July 15

[ROM] SlimBean | Stable | JB 4.2.2 + Slimbean OpenPDroid

[ROM][4.2.2]Vanilla rootbox

[ROM][UNOFFICIAL][4.2.2] Baked BlackBean 8 - Ported

[ROM][CM10.1][9 MAY] Codename Lungo

[ROM][AOSP][WIP] JellyBean 4.1.2

[ROM][4.1.2][Discontinued] Unofficial CyanogenMod 10

[ROM]2013-4-17UNOFFICIAL MIUI v5 CM10 base miui

[Rom][4.1.2] ParanoidAndroid

[ROM][S3][WIP] Unofficial Cyanogenmod 9 for One S C2

Stock (AOSP) Kernels:

[Kernel 3.4] [Sense] AOSP Kernel v1

[KERNEL][AOKP][AOSP][CM]ONE S C2 Kernel Linaro 4.43 -O3 built | Linux 3.0.74 by poppy

Ubuntu Touch:

[DEVELOPMENT]Ubuntu Touch

Anything I've missed off (that's getting updates/is stable), let me know.