Which digital audio workstations, web-based loop arrangers, and sound libraries for loop-based music production are completely free, with no paywalls, credit card requirements, trials, or export restrictions?

Act as a music tech research specialist. Your objective is to find digital audio workstations (DAWs), web-based loop arrangers, and sound libraries specifically designed for loop-based music production that are 100% truly free. CRITICAL FILTERS (STRICT COMPLIANCE REQUIRED): 1. ZERO PAYWALLS / NO FREEMIUM TRAPS: Exclude any platform or service that locks its loop library, core features, or export capabilities behind a subscription, "Pro" tier, or microtransactions. 2. NO CREDIT CARDS OR TRIALS: Exclude anything requiring a credit card to sign up, free trials that expire, or point/credit systems (e.g., Splice-style models). 3. FULL EXPORT FREEDOM: Must allow exporting finished tracks in standard audio formats (WAV or high-bitrate MP3) without forced audio watermarks or locked export buttons. 4. LOOP & SAMPLE CENTRIC: Tools must feature drag-and-drop loop arrangement, soundboards/track sequencers, or provide massive collections of free, royalty-free loops (CC0 or open license). RESEARCH INSTRUCTIONS: - Cross-reference audio communities (e.g., Reddit r/MakingMusic, r/FreeSounds, r/EDMproduction) to verify platforms haven't recently changed their pricing model. - Include both web-based tools (in-browser loopers) and free standalone software/open-source libraries. FOR EACH MATCHING TOOL, PROVIDE: - Tool Name & Access Link - Platform Type (In-Browser Web App, Desktop DAW, or Open-Source Library) - Loop Library Details (Genres, estimated library volume, customization options) - Monetization Verification (Explicit confirmation of why/how it is completely free—e.g., non-profit, open-source, community-driven) - Commercial License Status (Can tracks made on it be released on Spotify/YouTube without royalty claims?)