Taxes/Accounting:

Internal Revenue Service: http://www.irs.gov/
Illinois Department of Revenue: http://www.revenue.state.il.us/
Illinois Department of Employment Security: http://www.ides.state.il.us/
Social Security Administration: http://www.ssa.gov/
Illinois Secretary of State: http://www.cyberdriveillinois.com/
EFTPS Online: https://www.eftps.gov

Informational

Illinois Corporate/LLC Name Search: http://www.ilsos.gov/corporatellc/
Where's My Federal Refund?: https://sa1.www4.irs.gov/irfof/lang/en/irfofgetstatus.jsp
Where's My Illinois Refund?: https://www.revenue.state.il.us/app/refund/servlet/RefundStatus
Historical Stock Prices: http://bigcharts.marketwatch.com/historical/

Real Estate Taxes

Cook County: http://www.cookcountytreasurer.com/payment.aspx?ntopicid=3
DuPage County: http://www.dupageco.org/treasurer/lookup.cfm
Kane County: http://www.co.kane.il.us/TaxAssessment/Access.aspx
Kendall County: http://www.co.kendall.il.us/Taxinquiry/forms/search.aspx
Lake County: http://www.lakecountyil.gov/Treasurer/payments/CurrentPaymentStatus.htm
McHenry County: http://mchenrycotaxweb.org/cgi-bin/taxbill.pl
Will County: http://www.willcountysoa.com/search_address.aspx

Investments:

American Funds: https://www.americanfunds.com
Cole Capital: http://www.colecapital.com/
DWS Investments: https://www.dws-investments.com
Franklin Templeton: https://www.franklintempleton.com
Genworth Financial: https://www.genworthfinancialsecurities.com
ING Funds: http://www.ingfunds.com/
Invesco AIM: https://www.invescoaim.com
Jackson: https://www.jackson.com
Prudential Annuities: http://www.annuities.prudential.com
Putnam Investments: http://www.putnam.com
Wells REIT: http://www.wellsref.com/index.jsp

Business Associations:

Northpoint Financial, Inc.: http://www.northpointfingrp.com
SAI Financial Services, Inc.: http://www.saifinancial.com