Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.

Facebook Messenger - Facebook Messenger is a faster way to message.

Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.

Amity - Amity's Customer Relationship Hub simplifies customer success management.

Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.