A Summary of All The Information You Need
As a Singaporean, it should be a norm for you to own insurance policies with several companies.
You may have your health insurance with Company A, Critical Illness insurance with Company B and Personal Accident insurance with Company C. It does get confusing when you do need to enquire about your policy or even to make a claim.
With that, here is a summary of the list of insurance company's information.

Website, Contact, Email and Mobile Application
AIA
Contact Number: 1800 248 8000
Email: NA
Customer Login: My AIA SG
Website Link: aia.com.sg
Mobile Application: My AIA SG
Aviva
Contact Number: 6827 7988
Email: cs_life@aviva-asia.com
Customer Login: MyAviva
Website Link: aviva.com.sg
Mobile Application: NA
Axa
Contact Number: 1800 880 4888
Email: comsvc@axa.com.sg
Customer Login: MyAxa
Website Link: axa.com.sg
Mobile Application: MyAxa
China Taiping
Contact Number: 6389 6111
Email: feedback@sg.cntaiping.com
Customer Login: NA
Website Link: sg.cntaiping.com
Mobile Application: NA
ChinaLife
Contact Number: 6727 4820
Email: CustomerCare@chinalife.com.sg
Customer Login: NA
Website Link: chinalife.com.sg
Mobile Application: NA
Life Insurance Corporation
Contact Number: 6223 4797
Email: crm@licsingapore.com
Customer Login: NA
Website Link: licsingapore.com
Mobile Application: NA
HSBC Life
Contact Number: 6225 6111
Email: NA
Customer Login: NA
Website Link: hsbc.com
Mobile Application: NA
Manulife
Contact Number: 6833 8188
Email: NA
Customer Login: MyManulife
Website Link: manulife.com.sg
Mobile Application: NA
NTUC Income
Contact Number: 6788 1777
Email: csquery@income.com.sg
Customer Login: me.income
Website Link: income.com.sg
Mobile Application: Income Insurance
Raffles Health Insurance
Contact Number: 1800 248 8000
Email: Shield@RafflesHealthInsurance.com
Customer Login: NA
Website Link: rafflesshield.com.sg
Mobile Application: NA
SingLife
Contact Number: 6911 1111
Email: service@singlife.com
Customer Login: SingLife Customer
Website Link: singlife.com
Mobile Application: SingLife
Tokio Marine
Contact Number: 6592 6100
Email: customercare@tokiomarine-life.sg
Customer Login: Mypolicy
Website Link: tokiomarine.com
Mobile Application: TM Wave