* [Duet](https://duetapp.com/) - `⊘ Proprietary` Invoicing and project management with an integrated client portal. ([Demo](https://duetapp.com/demo/#dashboard)) `PHP`
* [Solo](http://www.getsoloapp.com/) - Solo is a free project management app created for freelancers. Create contacts, manage tasks, upload files, track project progress, and keep notes. ([Demo](http://www.getsoloapp.com/demo/)) `PHP`
## Proxy
* [Glype](https://www.glype.com/) `⊘ Proprietary` - Web-based proxy script written in PHP which focuses on features, functionality, and ease of use. Glype helps users to defeat Internet censorship and be anonymous while web browsing. `[Custom license](https://www.glype.com/license.php)``PHP`
## Self-hosting Solutions
* [Axigen](https://www.axigen.com/mail-server/free/) - `⊘ Proprietary` Great alternative to open source. It's a turnkey messaging solution, perfect for small & micro businesses, integration projects or test environments.
* [hMailServer](https://www.hmailserver.com) - `⊘ Proprietary` Open source e-mail server for Microsoft Windows. ([Source Code](https://github.com/hmailserver/hmailserver)) `C++`