Tax Spread - Free spreadsheet to calculate US Federal income taxes for both Microsoft Excel or Sun Microsystems StarOffice. Tax Technologies, Inc. - Provider of Internet/Intranet-based tax compliance and planning solutions for Fortune 500 clients. Specialize in International tax. BNA Software - Tax and Accounting Solutions for Software Professionals. AcQuest Programming Solutions - Publishes depreciation, tax penalty and interest, and Forms 941, 1120, and 1120S software. PracticalTaxSolutions - Offers software for corporate tax planning and compliance. Includes demo request. Vertex Inc - Offers Fixed Asset Management, Income Tax, and Sales Tax software CCH ProSystem fx - ProSystem fx offers a portfolio of tax compliance, planning, office management, and auditing software. Thomson Reuters - Software and services for corporate tax and corporate accounting professionals. CORPTAX - Professional tax software for domestic and international tax compliance, FIN 48 and FAS 109 tax provision, tax workflow automation, and corporate tax planning. Decision Modeling, Inc. - Performs restricted interest computations and global netted interest computations for federal interest obligations.