Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 784 131
2) Placement test : grammar for beginners (anonyme) 6 002 548
3) A/AN (webmaster) 5 371 587
4) Auxiliary BE (webmaster) 3 227 343
5) Present continuous (webmaster) 3 003 374
6) Present simple (webmaster) 2 926 356
7) Present simple (webmaster) 2 601 319
8) Present continuous (webmaster) 2 441 178
9) Adjectives (webmaster) 2 095 572
10) A/an (anonyme) 2 019 003
11) Present perfect simple (webmaster) 1 650 815
12) Preterite (webmaster) 1 637 465
13) Vocabulary - Placement test (bridg) 1 621 022
14) Preterite (webmaster) 1 453 140
15) Short placement test (webmaster) 1 445 174
16) To be (bridg) 1 408 247
17) Present perfect (webmaster) 1 352 237
18) What time is it? (webmaster) 1 351 349
19) The alphabet in English (webmaster) 1 322 952
20) Adjectives (anonyme) 1 217 852
21) What time is it? (webmaster) 1 211 875
22) Numbers (webmaster) 1 189 735
23) 'A' ou 'An' (anonyme) 1 178 201
24) Two presents: present continuous, present simple (webmaster) 1 151 801
25) To be (bridg) 1 147 191
26) Comparatives / Superlatives (webmaster) 1 110 756
27) Numbers (webmaster) 1 072 527
28) CAN / MUST (webmaster) 1 060 045
29) THE/ A / AN / nothing (webmaster) 1 036 723
30) Comparatives (webmaster) 1 008 534
31) Family life (bridg) 1 002 403
32) Numbers > 100 (webmaster) 987 679
33) Future (going to/will/present continuous) (anonyme) 966 750
34) Plural (webmaster) 957 232
35) Superlatives (webmaster) 876 599
36) Adjectives (anonyme) 876 183
37) Simple present (bridg) 855 677
38) Spelled words N°1 (bridg) 851 592
39) Placement test beginners: Check your spelling (anonyme) 830 896
40) Introducing oneself (webmaster) 828 116
41) Adverbs of frequency (anonyme) 819 751
42) Family (bridg) 786 044
43) General test-End of high school / Beginning of university (webmaster) 784 143
44) Present simple (anonyme) 784 085
45) Frequency adverbs (webmaster) 778 980
46) Present BE + Ving (bridg) 767 210
47) Passive form (anonyme) 732 071
48) Genitive (webmaster) 724 614
49) Family tree (anonyme) 720 491
50) Preterite: simple or continuous? (webmaster) 718 558
51) Placement test (beginners) (lili73) 702 861
52) Past simple or present perfect (anonyme) 697 736
53) Future (webmaster) 676 877
54) Present perfect simple (bridg) 665 105
55) 2 Preterites (webmaster) 664 058
56) Preterite (webmaster) 622 969
57) List of 200 irregular verbs and audio (bridg) 617 678
58) Modals (webmaster) 613 627
59) Spelled words N°2 (bridg) 610 289
60) Modals (webmaster) 608 480
61) Height (webmaster) 607 075
62) Articles a / an / the (anonyme) 596 783
63) Plural forms (bridg) 578 770
64) Nationalities (webmaster) 575 181
65) Past continuous / Past simple (anonyme) 569 984
66) Irregular plurals (bridg) 554 778
67) Two presents: simple and continuous (webmaster) 550 615
68) Preterite (bridg) 550 236
69) Superlatives (frapedur) 542 528
70) Vocabulary: greeting people (here4u) 536 591
71) Give your opinion (bridg) 533 015
72) Adverbs of Frequency (bridg) 517 867
73) Present simple or continuous (anonyme) 513 658
74) Present perfect / preterite ? (anonyme) 512 804
75) Possessive case (anonyme) 481 496
76) Countries & nationalities (bridg) 474 495
77) Past tenses (bridg) 472 362
78) 'The' or nothing? (webmaster) 471 928
79) Introducing oneself (easy) (webmaster) 471 371
80) Passive voice (webmaster) 465 119
81) Present Simple vs. Past Simple (anonyme) 460 562
82) Questions : how to ask them (anonyme) 449 245
83) General Test II / End of high school / Beginning of universi (webmaster) 446 896
84) IN, ON, AT or TO? (webmaster) 446 548
85) Relative pronouns (webmaster) 446 254
86) Comparative of superiority (anonyme) 440 782
87) How to pronounce the final -ED? (past simple) (webmaster) 439 681
88) Relative clauses (webmaster) 424 305
89) Sounds: [h] (webmaster) 420 058
90) Comparative (anonyme) 415 483
91) Past simple (anonyme) 400 871
92) A/an/Ø (bridg) 399 865
93) Future simple (anonyme) 397 836
94) This / That / These / Those (webmaster) 393 250
95) Conditional (webmaster) 392 809
96) Passive voice (anonyme) 391 918
97) Comparing (webmaster) 388 622
98) Can / could/ may/ might (woodyrun) 380 787
99) Present perfect or past tense (anonyme) 379 383
100) Much, many, little and few (felin) 374 916
101) Personal pronouns (anonyme) 371 735
102) Preterite continuous (BE + -ING) (webmaster) 371 186
103) Genitive case (bridg) 369 089
104) Some, any, no, enough, too/too much/too many (webmaster) 368 732
105) Confusing words - Placement test (bridg) 364 996
106) Irregular verbs (webmaster) 364 604
107) Numbers from 1 to 10 (anonyme) 362 092
108) Past perfect simple, past perfect continuous (anonyme) 361 265
109) Present continuous or present simple (webmaster) 360 150
110) Present perfect or preterite? (anonyme) 359 064
111) Simple Past : regular verbs (anonyme) 354 917
112) Comparative Adjectives (bridg) 352 777
113) Who, Whom, Which, or Whose? (anonyme) 349 894
114) Past simple (video) (anonyme) 349 534
115) Past simple or past continuous (anonyme) 345 740
116) While / When (anonyme) 340 976
117) What time is it? (webmaster) 338 699
118) Modals (tinou) 337 256
119) Modal: may/might (anonyme) 334 749
120) Cardinal and ordinal numbers (anonyme) 329 301
121) The superlative (anonyme) 327 781
122) Possessive adjectives and pronouns (woodyrun) 325 040
123) How to talk about the weather (lili73) 320 974
124) Since and for (anonyme) 319 786
125) Flags (webmaster) 318 118
126) Irregular verbs (bridg) 316 749
127) Pronouns (woodyrun) 315 496
128) Prepositions - in, on, at (anonyme) 314 594
129) Tenses (anonyme) 313 031
130) Placement test 3 (webmaster) 310 975
131) Order of adjectives (webmaster) 307 105
132) Could/Couldn't (laure95) 306 775
133) Comparative (anonyme) 305 357
134) Adjectives and prepositions (anonyme) 304 566
135) Agreement Tags (webmaster) 304 538
136) Asking questions (webmaster) 303 687
137) Present perfect OR simple past? (bridg) 298 860
138) Questions in the past tense (anonyme) 298 475
139) Uncountable nouns (webmaster) 296 542
140) Superlative Adjectives (bridg) 296 434
141) Object pronouns (bridg) 296 298
142) Passive form (anonyme) 294 084
143) Placement test 1 (anonyme) 293 394
144) Present simple (anonyme) 292 227
145) Can/Must/Should (laure95) 291 411
146) Past perfect (lili73) 290 689
147) Prefer/rather (bridg) 290 142
148) Must or Have to? (woodyrun) 288 570
149) The/an/nothing (bridg) 285 865
150) To be (anonyme) 283 657
151) Can and can't (laure95) 283 096
152) Vocabulary: asking and answering (here4u) 280 500
153) Modal verbs (bridg) 277 713
154) Some / Any / no... (bridg) 275 215
155) Days of the week (bridg) 269 222
156) So / neither (anonyme) 264 626
157) Past simple (video) (anonyme) 264 187
158) Present continuous (chnawa) 262 146
159) Used to (bridg) 260 600
160) Should / must (anonyme) 260 402
161) Past tense (anonyme) 259 781
162) Vocabulary: on the phone (here4u) 258 845
163) Find out a quantity (webmaster) 258 782
164) Articles : a / an / the / Ø (anonyme) 258 691
165) Superlative + and adjective (anonyme) 257 828
166) Comparative and superlative (anonyme) 257 318
167) Numbers 1/100 (anonyme) 253 982
168) Modal can (video) (anonyme) 253 438
169) Comparatives (anonyme) 251 349
170) Relatives pronouns (who, which, that...) (anonyme) 247 898
171) A few, a little, few, little (anonyme) 246 435
172) Vocabulary: at the restaurant (here4u) 245 713
173) Would rather / would prefer to (anonyme) 244 873
174) Present continuous and the Going to form (anonyme) 243 285
175) Should/ have to/ must (anonyme) 241 194
176) Have something done (anonyme) 240 156
177) Used to/would (woodyrun) 238 398
178) The past (webmaster) 238 051
179) Future continuous and future perfect. (felin) 238 035
180) How to ask a question in English (bridg) 236 174
181) Pluperfect (webmaster) 234 506
182) I wish, if only (felin) 234 406
183) Some / any (younes91) 234 167
184) Countable or Uncountable? (webmaster) 233 855
185) Should / shouldn't (anonyme) 232 077
186) Present simple or continuous (bridg) 230 838
187) Adjectives - ing and ed (felin) 229 597
188) Hypothesis (webmaster) 228 716
189) Must or mustn't (laure95) 226 976
190) Auxiliary BE (anonyme) 226 644
191) Articles a/an/the/0 (bridg) 226 480
192) Article The or nothing (anonyme) 226 322
193) Present perfect with Ever - never - (anonyme) 226 167
194) Present continuous OR Present simple? (bridg) 225 746
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 156
196) Comparison (komiks) 221 312
197) To / in order to / so as to / so that (irish21) 221 207
198) Present perfect (bridg) 219 846
199) Indirect speech (bridg) 217 974
200) What time is it ? (anonyme) 217 944
