CiteSpace
Detect the turning points in a field — citation analysis with a temporal lens.
Tier 3 ToolsFree
Research Database Directory
Every research database, reviewed.
Bibliometrix
Bibliometric analysis in R — reproducible science mapping, code-first.
Tier 3 ToolsFree
Publish or Perish
Citation metrics on demand — pull an author or topic's impact in seconds.
Tier 3 ToolsFree
Scholarcy
Auto-summarize any paper into a structured flashcard.
Tier 3 ToolsFreemium
Scilit
A fast, free scholarly index — MDPI's comprehensive metadata search.
Tier 3 Open AccessFree
Fatcat
The Internet Archive's open catalog of scholarship — the editable backbone under IA Scholar.
Tier 3 Open AccessFree
SciSpace
Read, chat with, and understand papers — an AI copilot for the PDF.
Tier 3 ToolsFreemium
Litmaps
Interactive citation maps that keep your literature review alive.
Tier 3 ToolsFreemium
Inciteful
Fast, free citation-network analysis — find the papers that connect your papers.
Tier 3 ToolsFree
Undermind
Deep, agentic literature search — thorough where keyword search is shallow.
Tier 3 ToolsFreemium