AudioMass
AudioMass is a free full-featured web-based audio & waveform editing tool
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Photopea | Online Photo Editor
Photopea Online Photo Editor lets you edit photos, apply effects, filters, add text, crop or resize pictures. Do Online Photo Editing in your browser for free!
Play DOS games online
Play DOS games online in your web browser, for free! Enjoy the best DOS games again, play DOS games online anywhere. Play old classic games for free online!
Task tracking for nerds - HOLLY SHELL
DataQuest -- learn data science in your browser, for free
Learn Python and R for data science. Learn by coding and working with data in your browser. Build your portfolio with projects and become a data scientist.
Online Markdown Editor - Dillinger, the Last Markdown Editor ever.
Dillinger is an online cloud based HTML5 filled Markdown Editor. Sync with Dropbox, Github, Google Drive or OneDrive. Convert HTML to Markdown. 100% Open Source!