Top rated sites
The highest SI Scores across the directory, based on the same published scoring rules.
zeroheight
zeroheight.comDesign-system documentation connected to design and code sources
ZeroTier
zerotier.comVirtual LAN networking with explicit member authorization
Zervant
zervant.comPrepare estimates and invoices from a browser or phone
Zettlr
zettlr.comA free, open-source Markdown editor for research notes and long-form writing.
Zig
ziglang.orgCompile systems software with a general-purpose language built around explicit control and cross-compilation.
Zim Desktop Wiki
zim-wiki.orgMaintain linked wiki pages in a local, plain-text notebook.
ZioTalk
ziotalk.krA Korean business messenger with organization, department, and project rooms for internal or guest collaboration.
Zipkin
zipkin.ioCollect and search distributed traces to locate latency and dependency problems across services.
Zipline Reloaded
github.comMaintain event-driven Python backtests with the Zipline research model
Ziteboard
ziteboard.comSketch and teach together on a browser-based infinite whiteboard.
Zod
zod.devDefine JavaScript and TypeScript schemas that validate data and infer its types.
Zoho Analytics
zoho.comPrepare connected business data and turn it into interactive reports and dashboards.
Zoho Bookings
zoho.comPublish appointment types and let customers choose a slot from your availability.
Zoho Calendar
zoho.comManage personal events, team calendars, appointments, and shared resources in one online calendar.
Zoho Cliq
zoho.comCoordinate teams in chats and channels with meetings and shared work context.
Zoho CRM
zoho.comConfigurable sales workflows with shared spaces for collaborating teams
Zoho Invoice
zoho.comTurn accepted quotes into invoices and follow up on payment
Zoho Meeting Whiteboard
zoho.comSketch meeting ideas with flowcharts, uploaded images, shape recognition, and downloadable boards.
Zoho Projects
zoho.comPlan project work with Gantt schedules, dependencies, and timesheets.
Zoho Social
zoho.comSocial publishing with admin-defined queues and channel reporting
Zoho Sprints
zoho.comPlan agile work from backlog and sprint boards through releases, reports, and timesheets.
Zoho Survey
zoho.comBranching surveys with multichannel collection and result reports