Clio - Clio provides a full suite of web-based practice management tools targeted specifically at the administrative needs of sole practitioners and small firms.

Baobab Disk Usage Analyzer - Baobab Disk Usage Analyzer is one of the light-weight disk analyzers that offers you a chance to view and monitor the disk usage & folder structure without any hassle.

CosmoLex - A law practice management software, integrated web / cloud-based legal practice management solution or case management software for attorneys and law firms

ncdu - A disk usage analyzer with an ncurses interface, aimed to be run on a remote server where you...

PracticePanther - PracticePanther offers CRM, invoicing, time tracking and communication solutions for law firms.

WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.