DistillerSR
Enterprise-grade systematic review automation — for audit-heavy evidence work.
Tier 3 ToolsSubscription
Research Database Directory
Every research database, reviewed.
Citavi
Reference management plus knowledge organization — think, then write.
Tier 3 ToolsFreemium
DOAB
The Directory of Open Access Books — DOAJ's counterpart for scholarly monographs.
Tier 3 Open AccessFree
LILACS
Latin American and Caribbean health literature — the regional index PubMed misses.
Tier 3 Open AccessFree
DataCite
DOIs for data — the identifier registry that makes datasets citable.
Tier 3 ToolsFree
ROR
A persistent ID for every research organization — ORCID for institutions.
Tier 3 ToolsFree
PubPeer
Post-publication peer review — where the community flags what the journals missed.
Tier 3 ToolsFree
Overton
The policy-document database — see where research shows up in government.
Tier 3 CorporateSubscription
Sciety
Preprint evaluations in one place — see which preprints experts have vetted.
Tier 3 ToolsFree
Internet Archive Scholar
Full-text search of the preserved scholarly record — including the hard-to-find.
Tier 3 Open AccessFree