I didn't want to make this guide at first, since the way equipments work will be changed in the future. Though, I'm currently unable to spend much time working on this game, soooo that might be a bit until then.

Golden Necklace - Boon of Fortune
"Shiny... it feels lucky."
+Increases money gained in dungeons by 50%

Silver Necklace - Curse of Knowledge
"It seems to know a lot..."
+You can see traps
-Enemies can see you, wherever you are

Golden Ring - Curse of Rage
"It seems to enhance your aura..."
+Randomly increases your Atk and SpAtk
-Randomly blocks your attacks

Silver Ring
"Your aura can't detect any magic within this ring..."
+Sells for more than other equipments (500P instead of 100-300P), but has no effect

Pink Bandana - Curse of Love
"Touching it feels... good."
-You become charmed when your lust is >50

Red Bandana - Curse of the Brute
(Requires INT Loss)
"Touching it makes you think about fighting..."
+Increases  Atk and SpAtk by 2 stages
-Being attacked has a 40% chance to lower INT by 1

Blue Bandana - Curse of Dependency
(Requires INT Loss)
"It makes you feel protected..."
+Increases Def and SpDef by 2 stages
-40% chance to lower INT by 1 when changing floors (yeah I should really nerf that)

Green Bandana - Boon of Healing
"It smells good..."
+Every step taken has a 1% chance to heal 30 HP

Pink Collar - Curse of Lust
"It makes you excited to wear..."
+Gain +30% EXP (note that this is multiplicative to other EXP changes)
-Every step increases lust by 1

Red Collar - Curse of Servitude
"It makes you see a new side in your enemies..."
+Increases  Atk and SpAtk by 2 stages
-Being attacked increases lust by 10
-After every step, gain lust equal to the amount of enemies within 4 tiles

Blue Collar - Curse of Credulity
(Requires INT Loss)
"It swears to protect you..."
+Increases Def and SpDef by 2 stages
-Submitting to enemies reduces INT by 1

Green Collar - Curse of Submission
(Requires INT Loss & Chastity)
"It makes you want to submit to it..."
+Your saturation does not decrease
-If M, gain chastity cage; if F, lose 2 INT (note that both effects apply on gain only)

Pink Scarf - Curse of Change
(Requires Gender TF)
"It makes you feel cute..."
-MtF Gender TF

Red Scarf - Curse of Drained Thoughts
"It tells you soothing stories..."
+Gain +50% EXP (note that this is multiplicative to other EXP changes)
-40% chance to lower level by 1 when changing floors

Blue Scarf - Boon of Protection
"Its touch makes you happy..."
+Your level can not decrease

Green Scarf - Curse of Binding
"It wants you to enjoy the moment..."
+Prevents Block and Sleep
-Binds you when entering a new floor

Pink Bow - Curse of Innocence
"It feels innocent..."
+Prevents Corruption
-Become charmed when near an enemy

Red Bow - Curse of Corruption
"It offers you a greater life..."
+Increases all healing by 75%
-Submitting to an enemy gives +1 Corruption

Blue Bow - Curse of Relaxation
"It makes you relax..."
+Makes you immune to Poison, Burn, Paralysis and Confusion
-Every step taken has a 2% chance to make you fall asleep

Green Bow - Curse of the Broodmother
(Requires Oviposition)
"It gives you motherly feelings..."
+Gain a full belly when getting eggs (adding +200 saturation)
+Makes you immune to Poison, Burn and Paralysis
-Whenever something puts eggs into you, increase that number by 1
-Submitting to enemies increases egg count by 1