Office & Productivity

Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.

Edit PDF files with PDF Candy - a free online PDF editor. Convert PDF to Word, PDF to JPG, merge PDF, split PDF, compress PDF, etc.

iLovePDF is an online service to work with PDF files completely free and easy to use. Merge PDF, split PDF, compress PDF, office to PDF, PDF to JPG and more!

Smallpdf - the platform that makes it super easy to convert and edit all your PDF files. Solving all your PDF problems in one place - and yes, free.

Mendeley is a free reference manager and an academic social network. Manage your research, showcase your work, connect and collaborate with over five million researchers worldwide.

Collaborative Calculation and Data Science

An online LaTeX editor that's easy to use. No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more.

An online LaTeX editor that just works. No installation, live preview, and sharing. Get stuff done with or without an Internet connection.

Straw Poll is the best place to create instant, real-time polls for free.