Description: Scrutiny is an open-source alternative to Photoshop focused on non-destructive editing and photo retouching. It has layers, masks, filters and tools for image manipulation.
Type: software
Pricing: Open Source
Description: The W3C Markup Validation Service is a free tool that checks HTML and XHTML documents for conformance to W3C standards. It can help identify potential issues in web pages and ensure they use valid markup.
Type: software