bibliotecadigital.unicamp.br
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kitakyu.repo.nii.ac.jp
Find digitized publications and collection items through an online library.
reptile-database.org
The Reptile Database is a taxonomic catalogue of lizards, snakes, tuataras, crocodiles, amphisbaenians and turtles. It provides advanced search, data downloads, publications and links, and is maintained by editors with volunteer help.
fis.uni-bamberg.de
The Research Information System (FIS) of the University of Bamberg provides an overview of research activities and outputs across the university's disciplines and the State Institute for Family Research. It also serves as the institution's open access repository for academic publications and research data.
app.researchrabbit.ai
Accelerate your literature reviews with ResearchRabbit – explore, organize, visualize, and stay up-to-date.
recercat.cat
RECERCAT is a cooperative repository of research literature from Catalan universities and research centers. It holds articles, research works, final projects, congress talks, reports and working papers, which can be sent directly or collected from institutional repositories. It integrates documents in a common space and states its purpose as increasing the visibility of research carried out in Catalonia.
researchsquare.com
Research Square is a multidisciplinary preprint platform where authors can post full-text preprints with DOIs before journal publication. Preprints are free to post, screened for author information and declarations, and indexed in several scholarly services. Readers can browse preprints, comment on emerging research, and follow manuscripts under journal review.
tewaharoa.victoria.ac.nz
Open access repository for research outputs from Victoria University of Wellington, New Zealand.
resources.library.ubc.ca
UBC library resource portal for searching databases, collections, guides, and research tools.
restofworld.org
Rest of World is a nonprofit publication reporting on how technology affects people outside the Western world. Its stories cover AI, data centers, electric vehicles, chips and platform regulation across Asia, Africa, Latin America and the Middle East.
retronews.fr
Digital newspaper archive of the BnF.
retrostic.com
Retrostic is a site for downloading retro game ROM and ISO files for consoles such as GB, GBC, GBA, NDS, N64, NES, SNES, Sega and Atari. It also offers an emulator section and a database of titles, and states direct download links carry no .exe files, viruses or disturbing advertisements.
rr.reuser.biz
Reuser is an OSINT resource for online investigations, research links, search methods, and public data tools.
reversedictionary.org
Reverse Dictionary is a search tool that finds words matching a definition or description. It indexes millions of dictionary definitions from the open-source WordNet database. Users can click words in results to see their definitions.
pt.revistasdeideias.net
Research project and digital archive of Portuguese cultural magazines.
raylibtech.itch.io
rFXGen is a sound effects generator based on Dr.Petter's sfxr. It offers predefined presets, multiple wave types and sound slots, and can export wave data as .wav, .qoa, .raw or .h files. It is available as a WebAssembly online tool and as a standalone download for Windows and Linux.
artbase.rhizome.org
Browse digitized texts, images, archives and cataloged cultural materials.
riseupfeministarchive.ca
A digital feminist archive based in Toronto, Ontario.
rivestack.io
Rivestack offers managed pgvector on dedicated PostgreSQL with local NVMe storage, keeping vectors and application rows in one database. It provides tuned HNSW and StreamingDiskANN indexes, always-on compute with no cold starts, and migration help. Published measurements cover search latency and throughput. New customers get a 7-day free trial, then a plan from $29 per month.
roadmap.sh
A community-driven collection of roadmaps, articles and guides intended to help developers grow in their careers. It offers role-based and skill-based roadmaps, best practices and guides, covering topics such as frontend, backend, full stack, DevOps, data analysis and machine learning, and allows searching available roadmaps.
robloxden.com
Roblox Den is a companion site for Roblox offering guides, tools and tips for the game. It includes databases of music codes, game codes and catalog item codes, along with tools such as admin commands, a username generator, color codes and emotes. The site also provides best games lists and decal IDs. An app and a browser extension extend access to its codes.
robtex.com
Robtex offers free DNS lookup and network intelligence. It gathers public information about IP numbers, domain names, host names, autonomous systems and routes, indexes it in a database, and provides lookup tools including reverse DNS, Whois and AS macros.
rock-zas.de
Find digitized publications and collection items through an online library.
rockawayx.com
RockawayX is a venture capital and infrastructure firm working with Web3 projects, offering capital, engineering and liquidity support. It runs blockchains via validators and provides on-chain liquidity to DeFi protocols. It operates its own data centers and develops hardware for network launches.