WinMerge - WinMerge is an open source differencing and merging tool for Windows.

RTG Bills - Billing Made Easy: RTG Bills is software for legal billing and time tracking; for attorneys in law firms and sole practitioners; lawyer billing and accounting software; trust accounting

AptDiff - AptDiff is a visual text / binary files comparison and merging utility for Windows.

CaseFox - Web-based legal software for law firms and lawyers that has timekeeping, legal billing, expense tracking, time billing, trust accounting, case management, and many more features.

CompareMerge - CompareMerge is a software tool for file comparison and merging text-like files. It is useful for determining what has changed between versions, and then merging changes between...

TekLAW - New Wave Tek, home of TekLaw law office practice management software. Calendaring, billing, case management software.